Radeon X800 Non-Pro/X800 XL/X850 Voltmods

[Urlyin]

[Page=Introduction]
Introduction

This article is based on the previous voltmod article (http://www.techpowerup.com/articles/overclocking/voltmods/101) for the Radeon X800 Pro, X800 Pro VIVO, X800XT and X800XT PE AGP line and has been adapted to apply to the Radeon X800 Non-Pro, X800 XL and X850 PCI-Express line using PCB #A474.

As always, the familar warning of "This will void the warranty" and "We take no responsibility of any kind should you damage your video card" applies before we start. Remember to take your time and don't over do it. You should seriously consider replacing the stock HSF if you plan to crank high on the overclock . Check out our GPU Heat Sink Fan Reviews here (http://www.techpowerup.com/reviews).

You should have at least tested your video card for a week under benchmarking and gaming before beginning the vmods to rule out issues prior to starting your vmods. Also, should you have any questions or information you wish to share, please post them here (http://forums.techpowerup.com/showthread.php?t=2184).

Chips
The chips that we will be working with are the same in both series, just in slightly different locations. With ATI's introduction of these cards they have new GPU cores as well.

<table cellpadding="4" class="resulttable">
<tr><th>Card Name</th><th>GPU Core</th></tr>
<tr><td>X800</td><td>R423</td></tr>
<tr><td>X800 XL</td><td>R430</td></tr>
<tr><td>X850</td><td>R480</td></tr>
</table>

The ATI's official X800 GPU temp specs remain the same for these cores:


<table><tr><td>Thermal Parameter Value</td><td>temperature</td></tr>
<tr><td>Maximum recommended ASIC case (or center of die backside for flip chip)</td>
<td>105°C</td></tr>
<tr><td>Absolute maximum rated junction temperature: TJmax</td><td>125°C</td></tr>
<tr><td>Minimum ambient operating temperature</td><td>0°C</td></tr></table>


The chips will be working with:
VGPU: Fairchild FAN5240MTC, Datasheet (http://www.fairchildsemi.com/ds/FA/FAN5240.pdf)
VDD & VDDQ: Intersil ISL6522CB, Datasheet (http://www.intersil.com/data/fn/fn9030.pdf)

The FAN5240MTC that we will be doing our VGPU voltmod on also has another use. Interesting info from Fairchilds product folder:

General description

The FAN5240 is a single output 2-Phase synchronous buck controller to power AMD's mobile CPU core. The FAN5240 includes a 5-bit digital-to-analog converter (DAC) that adjusts the core PWM output voltage from 0.925VDC to 2.0VDC, which may be changed during operation. Special measures are taken to allow the output to transition with controlled slew rate to comply with AMD's Power Now™ technology. The FAN5240 includes a precision reference, and a proprietary architecture with integrated compensation providing excellent static and dynamic core voltage regulation. The regulator includes special circuitry which balances the 2 phase currents for maximum efficiency.


Max. safe voltages

<table class="resulttable" cellpadding="4">
<th colspan="2">VGPU</th></tr>
<tr><td>Stock:</td><td>1.31V - 1.41V</td></tr>
<tr><td>Air cooling:</td><td>~1.45V</td></tr>
<tr><td>Water cooling:</td><td>~1.7V</td></tr>
<tr><td>Phase change:</td><td>~1.85V</td></tr>
</table>

<table class="resulttable" cellpadding="4">
<th colspan="2">VDD</th></tr>
<tr><td>Stock:</td><td>1.95V - 2.05V</td></tr>
<tr><td>Active + Passive cooling:</td><td>2.45V</td></tr>
</table>

<table class="resulttable" cellpadding="4">
<th colspan="2">VDDQ</th></tr>
<tr><td>Stock:</td><td>2.04V - 2.10V</td></tr>
</table>

[page=Overview, Tools & Preparation]
Overview

http://www.techpowerup.com/articles/112/images/x800_small.jpg (http://www.techpowerup.com/articles/112/images/x800.jpg)
Overview- click on pic to enlarge

Above image gives us our vmod locations and points of reference. The blue Sapphire PCB #A474
has the same layout as the red ATI PCB, so it will work on all those models, no matter which manufacturer.
To the bottom right our arrow color code for the chips and measurement points, with the yellow arrow for our IGPU vmod.

As in the last article we'll start with the Pencil Vmod, along with the VID Vmod. The VID Vmod is something new to some of you and is the voltage identification code (VID) that sets the resistor divider for different output voltages. Which has been used by ATI since the 9800 PCB and by using 5 pins labeled VID0 to VID4 on the FAN5240 pins 7-11 are used to set the default voltage. With the VID table provided from the datasheet we can change the default voltage setting.

Tools and Supplies

Digital Multimeter (a must have to complete mod safely)
Magnifying Glass
Electrical Tape (get the color that matches your PCB)
2b Pencil (works the best, found one at Staples in Drafting Department)
Conductive Pen


It's easier to use Alcohol (99% Isopropyl Alcohol) and a Qtip to clean the graphite off the resistor. When I have brought the resistance down too low, I'll dab the dry end on the resistor a couple of times and recheck the Ohm reading. If it doesn't bring it back up to where I want it, I'll wet the other side of the Qtip with Alcohol to clean and restart.

Starting Prep Work
Before we get down to work, let's run through the multimeter to make sure we are on the same page.
You will be using two different settings. One to check the voltage before and after we make our changes. The second to check the resistance in Ohms of the resistors we're using our 2b pencil on, to safely lower their resistance to raise the voltage.
To check the voltage for the VCore and VMem starting measurements, set the multimeter to DCV 20V and to check Ohm resistance you'll set the meter to Ohms 2k or 20k depending on the resistor we're working with.

Measure GPU Voltage
Begin with writing down our starting voltages using the above pic, labeled Overview. Starting with locating the green arrow pointing to the capacitor close to the middle of the board labeled C60.
Now with the system running and the side cover off, visually inspect the area to first locate the capacitor and making sure there isn't anything in the way. Set your meter to DCV 20 V before placing the black lead of your meter on the screw holding in the video card, this is ground. Important when touching card with a meter lead that you don't accidently ground something out. Carefully place the red lead on the top side of capacitor C60 (you're upside down from the pic facing the card). Your meter should be reading around 1.40 V, cards vary from manufacturer to manufacturer. Write that VCore number down for future reference. There is not a measure point for the IGPU Vmod that I'm aware of at this time.

Measure Memory Voltage
Lets move to the VDD (VMem) & VDDQ measure points. In our Overview pic above, locate the green arrows pointing to our measure points, over to the left of the card labeled C1928 for the VDD and C1807 for the VDDQ. For a closer view click on the Overview pic to enlarge. With the same steps we used in the previous measure point. Place the black lead on ground carefully placing the red lead on the top side of C1928 (you're upsidedown from the pic facing the card). Your meter should be reading around 2.00 V. Record this as your default VDD voltage.

Now we are taking the last default voltage. Find the measure point in our Overview pic above, locate the green arrow pointing to capacitor C1807 for the VDDQ. Once more with the same steps as before place the black lead on ground carefully placing the red lead on the bottom side of C1807 (you're upside down from the pic facing the card). Your meter should be reading around 2.08 V. Write your VDDQ number down.

Now these numbers can be important in the Pencil Vmod and the VR Vmod. Before starting up the card, we can check the resistance to have an idea of what the starting voltage will be. Better safe than sorry and everyone should take care whenever vmodding, for the hardware and yourself.

[page=Pencil & VID Vmods]
Pencil Vmods & VID Vmods

We are seeing so many different variants of the ATI PCB from the OEM manufactures in regards to the layout of components, to the lack there of. For some this will be bad news, given the fact that there is no longer a SMR at R1597 on most PCI-E cards. This renders the pencil Vmod for the VCore unable to lower resistance to raise voltage enough to make a difference by just using the two solder pads to which the graphite will not stick. The reason for the not having the resistor can be best explained by ViperJohn.

ATI didn't have to populate and create the voltage divider on the x850 PWA because they changed the VID jumper programming to increase 5240's programmed regulation setpoint from the gitgo.
Doing that they didn't have to trick the 5240 into regulating at a higher voltage by reducing the feedback voltage with a divider.

Which means we now have to use the VID vmod to change the VCore, but this is not adjustable. This however does not affect the use of a variable resistor as before and does not mean you still can not try the pencil on the VCore. Thanks to Kramda for reminding us of the Fan5240 VID settings.

With your card out of the system and your work area static free. Basically what we are trying to do is use our 2b pencil to reduce resistance on the selected resistor. You'll need to measure the resistance in Ohms first, by placing the black lead on one side and the red lead on the other side of the resistor, write it down it's our starting Ohm reading. Then gently run your pencil along the side of the resistor from one end to the other. Do a couple swipes then check again with the meter. Using the number you've written down subtract the new reading. For example, if your starting Ohm reading is .418k and your new reading is .400k obviously it's a 18k drop in resistance. If you go by the rule of 15k Ohms equals roughly .04V to .06V. Add the .04V - .06 V to the reading that you saved for future reference, for example the VCore reading of 1.39V your voltage should now be around 1.43V - 1.45V. A 10k variable resistor will give you around .04 Volts so again that's around 15k Ohms you need to reduce your resistor.
Keep in mind that if you want your card to last awhile don't get greedy.

VCore & IGPU Vmods

http://www.techpowerup.com/articles/112/images/vgpu_pencil.jpg
VCore & IGPU

Using the image above as our guide locate where the resistor R1597 used to be under the pencil labeled VGPU for those of you who still wish to try the Pencil Vmod. This is the two solder pads you will use the 2b pencil on, following the steps we went through above, but without a resistor, you'll try to use the space between or on either side of the pads to build a bridge.
Set your multimeter to 20k Ohms. A VCore voltage of 1.45V to 1.50V should work well. After you have reduced the resistance, place the card back in and power up. Check your VCore voltage again to verify the amount of voltage you're now running at. Test the card for artifacts and lockups. If all is well, use a piece of electrical tape and cover your work area. Review the max voltages suggested for cooling needs.

Now in most cases if not all, you'll need to do the VID Vmod to change VCore

The IGPU or Over Current Protection vmod is only needed, if you are applying a high VCore vmod. The higher the voltage your GPU runs at, the more power it consumes, the higher its current draw.
The VCore regulator chip has a built-in overcurrent protection feature which shuts the card down, if a certain amount of current draw is exceeded. This mod raises that limit.
In the above pic use a 20k Ohm reduction in resistance for OCP vmod, which is applied to resistor R1596. Since there isn't a measure point, remove the card and set your meter to 200k. Check the resistance on the resistor R1596 which should be around 40k Ohms. Lower the resistance by 20k Ohms.

VID Vmods

http://www.techpowerup.com/articles/112/images/x800vid.jpg
VID Vmod

http://www.techpowerup.com/articles/112/images/vidtable.jpg
VID Table

The VID Vmod requires a conductive pen or jumper to work. Looking at the image above, labeled VID Vmod, we can ascertain our default factory voltage by the placement of the SMR resistors by using the VID table below it. The picture shows a card with VID code 01101, which is 1.35V. By looking at the VID Vmod pic we can see, that there are SMD resistors at VID1, VID4 following the lines from pins 10 & 7 and by using the VID Table we use a zero(0) to show a resistor is present, with a 1 meaning no resistor present. So using 1.35V as an example to up the voltage using the VID setting we would use the VID table to determine a higher voltage with the same two SMR in place like the 1.55V setting to which we just connect the solder pads at VID2 with our conductive pen. Which would give a VID code of 01001. Unfortunately this limits our choices and for those with a 1.40V default voltage means the next available VID setting would be 1.60V without removing a SMR. Of course all is not lost if you are using a Water Block for cooling.

VDD & VDDQ Vmods
http://www.techpowerup.com/articles/112/images/vdd_pencil.jpg
VDD Vmod

In above image locate the VDD labeled pencil above the resistor R311. This is the resistor you will use the 2b pencil on, following the steps we went through above. Set your multimeter to 20k Ohms. A 20k variable resistor which will give you around .08V Volts, you'll need to reduce the resistance around 30k Ohms. A VMem voltage of 2.08V to 2.12V will work fine. After you reduce the resistance, place the card back in and power up. Check your VMem voltage to verify the amount of voltage you are running your memory at. As we did in the VCore vmod, test the card for artifacts and lockups. Use the tape to keep the graphite in place. Review the max. voltages suggested for cooling needs.

http://www.techpowerup.com/articles/112/images/vddq_pencil.jpg
VDDQ Vmod

This one will be a little tough given the resistor is in a tight spot. Again in the above pic locate the pencil labeled VDDQ above resistor R256, this is the one you'll need to pencil mod to increase VDDQ voltage. Set your meter to 2k Ohms this time. With the info of a 20k variable resistor giving .08 Volts we'll need to reduce resistance around 30 Ohms. A VDDQ voltage of 2.16V to 2.18V will help with both VCore and VMem. Check the voltage to verify the amount of voltage you're running at. Test for artifacts and lockups. Use the tape to keep the graphite in place. Review the max. voltages suggested for cooling needs.

[page=Variable Resistors]
Using Variable Resistors

Understanding the same warnings as posted previously in the begining of the article. You should read the "Introduction" and "Starting Prep Work" sections.

There are many different ways you can do the Variable Resistor (VR) vmods. Each one is a personal preference on how you want you card to look and how much time you wish to invest in the vmod. From the color of the VR to where, how to place it and if to use wires or even adding a switch to turn off the vmod. Of course I have to mention that you need good soldering skills to perform the vmods using a VR. So take a moment to view some of our members VR vmods to get ideas and to post your pics at techPowerUp! here (http://forums.techpowerup.com/showthread.php?t=3401). Great work guys and thanks for taking the time to post the pics.

[hr]


http://www.techpowerup.com/articles/112/images/x800_small.jpg (http://www.techpowerup.com/articles/112/images/x800.jpg)
Overview- click on pic to enlarge
The above pic gives us our vmod locations and points of reference. The blue Sapphire PCB #A474
has the same layout as the red ATI PCB, so it will work on all those models no matter which manufacturer.To the bottom right our arrow color code for the chips and measurement points, with the yellow arrow for our IGPU vmod.

Tools and Supplies

To do these mods you should aready have soldering skills and should be using a low wattage iron.


Digital Multimeter (have to have one)
Magnifying glass
Glue Gun (to set VR in place)
Variable Resistors: 1x 10k Ohm, 1x 250k Ohm, 2x 20k Ohm


Take note of the Max. Safe Voltages for different cooling in the "Introduction" section.

Next, read the "Starting Prep Work" section to get your default voltage. This can be important to get an idea of where your voltage will be when you crank up the card. You can still use the same table as the pencil mod. What I mean by that, is if the default Ohm reading of the VGPU is at 420 and you add the 10k VR, then given that a 10k VR will give you around .04V which in turn equals 15 Ohms then after adding the VR your new Ohm reading should be around 405 Ohms.

VR VGPU & IGPU

http://www.techpowerup.com/articles/112/images/vgpu.jpg
VR VGPU & IGPU

Locate the two solder pads in the above pic, where you will use the 10k VR for the VCore vmod. Set the VR to 10k or as close to 10k as it will go using your mulitimeter. Check the resistance to compare after you solder the VR. You can either solder the VR to the resistor directly or you can use wires. After soldering the VR on, check the resistance. Remember a 10k VR should give you around 15k Ohms Verify the voltage and test your card for artifacts and lockups. Review the max. voltages suggested for cooling needs.

Locate resistor R1596 in the above pic and set your VR to 250k. Check the resistance on the resistor to compare after you solder the VR on. Again, after soldering the VR on check the resistance. Like with the pencil mod you want to drop the resistance around 20k Ohms. Remember this vmod does not increase your overclock, but increases the max. you can set the VGPU voltage before the card will shut off.

VR VDD & VDDQ Vmods

http://www.techpowerup.com/articles/112/images/vdd.jpg
VR VDD

Using the above image we will solder a 20k VR to the pins 5 & 7 of the VDD chip ISL6522CB.
Set the resistor to 20k or as high as it will go and check the resistance before, then after you solder the VR. Verify the voltage and test your card for artifacts and lockups. Generally speaking, it helps to do the VDDQ along with the VDD vmod, in other words if you do the VDD you should plan to do the VDDQ as well. Review the max. voltages suggested for cooling needs.

http://www.techpowerup.com/articles/112/images/vddq.jpg
VR VDDQ

Same as the last vmod, use the above pic and solder a 20k VR to the pins 5 & 7 of the VDDQ chip ISL6522CB. Set the resistor to 20k or as high as it will go and check the resistance before, then after you solder the VR. Verify the voltage and test your card for artifacts and lockups. Review the max. voltages suggested for cooling needs.

[page=Conclusion]
Conclusion

Whether you're doing the Pencil Vmod or the VR Vmod I can not emphasize the importance of taking your time as well as not getting caught up in the "just a little more" syndrome. Given the different circumstances, your overclock will vary depending upon a multitude of factors. Set yourself a stopping point and test your card by playing some intense graphic games. The forums (http://forums.techpowerup.com/) here at techPowerUp! are filled with people who will not hesitate to help by answering a question. You can use ATITool (http://www.techpowerup.com/atitool/) or Systool (http://www.techpowerup.com/systool/) to set and test your OC. Remember to take your time and above all be safe.

[MMos]

I tried it , but can't get it working :(

First i measured VGPU on the measuring point it gives 1.408V.

Then i measured the VGPU resistor , was about .435K . I penciled it down to .390k and measured VGPU
again , still 1.408V.

Then i measured the IGPU resistor , was about 40k and i penciled it down to about 20K.
But still my VGPU is 1.408V.

I don't know why it doesn't raise the VGPU :confused:

Edit: Card is Powercolor X800XL

[Urlyin]

I tried it , but can't get it working :(

First i measured VGPU on the measuring point it gives 1.408V.

Then i measured the VGPU resistor , was about .435K . I penciled it down to .390k and measured VGPU
again , still 1.408V.

Then i measured the IGPU resistor , was about 40k and i penciled it down to about 20K.
But still my VGPU is 1.408V.

I don't know why it doesn't raise the VGPU :confused:

Edit: Card is Powercolor X800XL


MMos ... which measure point are you using? I see there are two shown ...

[MMos]

MMos ... which measure point are you using? I see there are two shown ...
I just can see one :confused: One the first picture (http://www.techpowerup.com/articles/112/images/x800.jpg) the green arrow labeled VGPU 10K.

[Urlyin]

You should be measuring the voltage at the bottom of cap c60 ...

[MMos]

You should be measuring the voltage at the bottom of cap c60 ... Yes this is the point(C60) i used. :confused: :(

[Ex0skelet0r]

and if i do this voltmod, what i will gain? more fps? less temprature?

[Urlyin]

Yes this is the point(C60) i used. :confused: :(
MMOs ... clean off the mod for the GPU. Recheck the ohms on the resistor you penciled and then check the resistor to the right of it in image number 5 (counting from the top down).

[Urlyin]

and if i do this voltmod, what i will gain? more fps? less temprature?

Ex .. increasing the voltage allows for higher mhz for GPU and MEM. Yes it does equal to higher FPS, depending upon the amount of OC gained. As far as heat, this can greatly increase, again depends on the amount of oc ..

[MMos]

MMOs ... clean off the mod for the GPU. Recheck the ohms on the resistor you penciled and then check the resistor to the right of it in image number 5 (counting from the top down).

I already cleaned the Mod after seeing no voltage gain. I rechecked everthing. R1596 has ~40K , and the right one on pic5 has ~435k

BTW. I tried to mod VDDQ and VDD , both worked like they should. It's just that damned VGPU mod that doesn't work for me. :(

[Unregistered]

I already cleaned the Mod after seeing no voltage gain. I rechecked everthing. R1596 has ~40K , and the right one on pic5 has ~435k

BTW. I tried to mod VDDQ and VDD , both worked like they should. It's just that damned VGPU mod that doesn't work for me. :(


MMOS the R1596 IGPU mod is not needed unless you going with a high VGPU ... still not sure why you didn't get an increase with the resistor shown. Do you see the resistor R1597? That is the one that should be shown in the image from W1zzard. Can you verify that? The way they changed the board it may not have a labeled beside the resistor but in a list below ...

[DoughtCom]

I'm wondering, I can only get a 410MHz Core/455MHz Mem stable with this X800XL I got from monarch computer. It's a sapphire (has the hologram on the board), but the PCB is Red. It even has the ugly chick STICKER over what looks like an ATI logo on the heatsink. Let me know what you guys think of that.

On to my main question.... since it's a red PCB (not that the ACTUAL color has anything to do with it obviously, but could be a different design), does that mean this mod will still work since it's a "sapphire"? Do you guys think it's a counterfit or anything or have people seen red versions as well? I DO get around a 5200 score in 3DMark so I know it's at least an X800 XL.

[Urlyin]

I'm wondering, I can only get a 410MHz Core/455MHz Mem stable with this X800XL I got from monarch computer. It's a sapphire (has the hologram on the board), but the PCB is Red. It even has the ugly chick STICKER over what looks like an ATI logo on the heatsink. Let me know what you guys think of that.

On to my main question.... since it's a red PCB (not that the ACTUAL color has anything to do with it obviously, but could be a different design), does that mean this mod will still work since it's a "sapphire"? Do you guys think it's a counterfit or anything or have people seen red versions as well? I DO get around a 5200 score in 3DMark so I know it's at least an X800 XL.

No big deal on it being red or blue ... check the images against the locations on your board. They should be the same and the mod should work. Your score of 5200 doesn't sound off for an XL ...

[Unregistered]

Hi all,

new to this forum.

I have a question about the OVP or IGPU mod on the x850. When do I have to do this one. I am guessing it protects the vgpu from getting to much volts. How many is too many volts? I am at 1.55v now.

musk

[AllBrain]

I have a small little problem with my Gecube X800XL. The PCB does not look the same at all:

http://img.photobucket.com/albums/v313/AllBrain/Problem.jpg

Here are the codes on the IC's that I think control the GPU and Memory voltage:
GPU - RT9256
Memory - RT9214
Can someone help me?

[Urlyin]

I have a small little problem with my Gecube X800XL. The PCB does not look the same at all:



Here are the codes on the IC's that I think control the GPU and Memory voltage:
GPU - RT9256
Memory - RT9214
Can someone help me?

Looks like they changed up from the Fairchild to a Richtek ... can you get a closer shot of the chip area?

Don't see anything on the Richtek web site for the RT9256 but here's the RT9214, are there two of these?

[Unregistered]

MMos i have the same problem!

you know how to fix it?

[W1zzard]

i fixed the vgpu location in the article .. previous one was the vdroop mod :)

[cubalis]

I am having the same problem with a powercolor vivo x800xl

The VDD and VDDQ have both been penciled and work perfectly, but the VGPU won't budge from 1.41V.

anyone resolve this yet?

[W1zzard]

cubalis did you use the updated pictures? changed earlier today

[cubalis]

yes I used the new pictures. I got my memory to oc stable to 580 instead of 540 before this mod, but my GPU needs a little more juice to get past where it's at now (454) ;)

And thanks for the info - this mod is very easy to do and has great results... if only I could get my VGPU up....

cheers

[funkflix]

@cubalis

It works perfect for me! Are u sure thet u used the new pics.? I'm now on 1,54V and it gaves me an boost about ~ 35MHz, it's ok, but it could be better! ;)

Make an pic from ur card, maybe it's an different layout?

Regards.

Edit: I'm on a x850 XT.

[cubalis]

ok, the penciled mod was applied to resistor with the green box. I took all readings for the VGPU on C60.

Also, this is the only x800xl that uses an external pci-e power connector (6 pin)..... could this have anything to do with it?

http://i2.photobucket.com/albums/y40/cubalis/overview2.jpg

http://i2.photobucket.com/albums/y40/cubalis/closeup2.jpg

[funkflix]

http://www.weber-steuerungstechnik.de/felix/closeup2.jpg

Use the two pins in the blue box! It will work!

[W1zzard]

that's the wrong one .. you have to pencil in the EMPTY spot to the left of your green box as indicated in the pictures

[cubalis]

that would be why it isn't working :o

Thanks for the help!

I'll come back and report how it went.

[cubalis]

Well, finally got it to work - 1.5v now.

final stable clocks on the powercolor x800xl vivo:
Core: 475MHz
Memory: 580MHz


Thanks again to everyone!

[funkflix]

Grats! :D

[webbyboy]

sorry to be dumb here, i am really totally noob on Vmods, Just wondering for pencil mods, how do we know how much we stroke on the resistors will increase how much voltage? i do not know have a voltmeter, so how am i going to set the voltage that i desired?

[funkflix]

Don't do the mod if u don't have an Multimeter! :)

[webbyboy]

I've gotten a multimeter, and i just penciled the two points for the vgpu mod, but when i measure it, the voltage gone down the more i stroke, even i stroke lightly, the voltage stay at 1.40. I don't know what's going on..

[daysleeper]

Should i use the pencil first on the vgu and vdd,and what igpu does??.When i should use vddq?

[Urlyin]

I've gotten a multimeter, and i just penciled the two points for the vgpu mod, but when i measure it, the voltage gone down the more i stroke, even i stroke lightly, the voltage stay at 1.40. I don't know what's going on..

Webbyboy and Daysleeper, Guys read the article here (http://www.techpowerup.com/articles/overclocking/voltmods/101) to get a better understanding of the mod. It's on the same chips just in different locations on this series of cards...


Thanks W1zzard ... looks like I need to get in gear ... :)

[Unregistered]

Webbyboy and Daysleeper, Guys read the article here (http://www.techpowerup.com/articles/overclocking/voltmods/101) to get a better understanding of the mod. It's on the same chips just in different locations on this series of cards...


Thanks W1zzard ... looks like I need to get in gear ... :)
thanks man....now i have x800 pro@xt vivo,so i know what happens with vgpu and vddr but igpu is new for me...

[Urlyin]

thanks man....now i have x800 pro@xt vivo,so i know what happens with vgpu and vddr but igpu is new for me...

Unless your are going to water cool or viperchill then you'll never reach the voltage needed to apply the IGPU... just for those applying high voltages to their GPU ...

[daysleeper]

jep i got watercooling...so exactly when should i raise the igpu??.or should i consentrate only in vgpu and vccd?

[webbyboy]

Webbyboy and Daysleeper, Guys read the article here (http://www.techpowerup.com/articles/overclocking/voltmods/101) to get a better understanding of the mod. It's on the same chips just in different locations on this series of cards...


Thanks W1zzard ... looks like I need to get in gear ... :)


Yes i've already read it, but there's no indepth explanation of using the multimeter to measure the voltage, the calculations and the conversion. Care to elaborate more?

[Urlyin]

Yes i've already read it, but there's no indepth explanation of using the multimeter to measure the voltage, the calculations and the conversion. Care to elaborate more?

Did you read the "Getting started" & " Pencil time" sections... simple but should get you going.

[Urlyin]

jep i got watercooling...so exactly when should i raise the igpu??.or should i consentrate only in vgpu and vccd?

Day... You'll know when to use the IGPU... the card will kick out on you... don't quote me but I think I remember it being around 1.65v on the VGPU vmod ... I'm trying to find time to start and finish the vmod write up... but it's based on the same settings here (http://www.techpowerup.com/articles/overclocking/voltmods/101/2) using the steps under the GPU overvolt protection ...

[Unregistered]

Not getting anywhere with the pincil mod either, voltage isn't moving. My card has no resistor there, and bridging with a pencil seems to do absolutely nothing. I've checked and rechecked with the voltmeter. 1.35 at start, 1.35 still no matter how many swipes I make.

[h017ah]

I've got some silver varnish with practically no resistance...
Will I achieve better results if I use this instead of a pencil? And is it safe?

[Urlyin]

I've got some silver varnish with practically no resistance...
Will I achieve better results if I use this instead of a pencil? And is it safe?


no....

[Urlyin]

Not getting anywhere with the pincil mod either, voltage isn't moving. My card has no resistor there, and bridging with a pencil seems to do absolutely nothing. I've checked and rechecked with the voltmeter. 1.35 at start, 1.35 still no matter how many swipes I make.


are you checking the resistence before and after you pencil?

[Advil]

I'm the "unregistered" guy a few posts up. :)

Yes, I measured resistance. Before the pencil, there was no contact between the points. Afterward I could get it around .4? (as in .42 to .46 depending on how many passes) but still no major voltage change. Do I need to reduce resiatance more? And what else can I use besides a pencil? I could put a resistor on it, but I'd like to not physically alter the card.

[h017ah]

no....
No to what?
About safety or about resistance...

[funkflix]

No to what?
About safety or about resistance...

U need resitance for the mod, thats the precept how a mod works!

That's not only an direct connection between two points, know what i mean? ;)

[Advil]

How about a trimmer? I have a handfull of 20k-50k variable trimmers, but I REALLY didn't want to physically alter the card.

Are there any other gurus here who can verify the pencil mod on an X800XL without any resistor at the VGPU?

Also, mine is the RED PCB, CompUSA business purchase from a week ago.

[Urlyin]

How about a trimmer? I have a handfull of 20k-50k variable trimmers, but I REALLY didn't want to physically alter the card.

Are there any other gurus here who can verify the pencil mod on an X800XL without any resistor at the VGPU?

Also, mine is the RED PCB, CompUSA business purchase from a week ago.

Read the article here (http://www.techpowerup.com/articles/overclocking/voltmods/101) to get an Idea of how to do the pencil mod... W1zzard updated the pics so make sure you review them again ...

[AllBrain]

Well I have found the two tech docs for the chips on my non-standard Gecube X800XL PCB. Can someone have a look at them please?

Memory (http://www.net-forums.net/forums/index.php?act=Attach&type=post&id=7212)
GPU (http://www.net-forums.net/forums/index.php?act=Attach&type=post&id=7213)

[daysleeper]

well i still don't know that when i pencil vgpu (yep no resistor there) so how i know when i got some pencil in it?.How many ohms should there be?.I'ts much easier when there is a resistor and you can measure that the value has gone down but when there is no resistor.... :eek:

[W1zzard]

penciling right on the pcb shouldnt be too hard and you can just measure between the solder blobs

[daysleeper]

penciling right on the pcb shouldnt be too hard and you can just measure between the solder blobs
yep i know that but what the measuring result should be (about)??

[Urlyin]

Well I have found the two tech docs for the chips on my non-standard Gecube X800XL PCB. Can someone have a look at them please?

Memory (http://www.net-forums.net/forums/index.php?act=Attach&type=post&id=7212)
GPU (http://www.net-forums.net/forums/index.php?act=Attach&type=post&id=7213)

AllBrain ... for the memory check the resistance between pins 3 & 6 with the card out of the case and then check any traces from pin 6 that lead to a resistor with the same ohm reading.. for the GPU try the same thing with pins 4 & 12

[musk]

How high can I go on the Memory voltage VDDQ and Vdimm for an x850xt pe?

I think they are 2.1v by default. I am at 2.2v on each. I have them sinked with lots of air flow. Can currently run at 651mhz.

Any recommendations?

musk

[Super XP]

Can the X800 XL be flashed into a X800XT /PE or X850XT /PE ?

Also, instead of the pensil MOD, can you just use a little wire for connecting & use heat glue to hold it in place? Anyway, I havent turned on the PC yet until I get an answer. Thanks.

http://img199.exs.cx/img199/3034/mvc044s1ch.jpg (http://www.imageshack.us)

http://img199.exs.cx/img199/2686/mvc045s9vg.jpg (http://www.imageshack.us)

http://img121.exs.cx/img121/5408/mvc040s4zu.jpg


--------------------------
Athlon 64 3200+(90nm)@ 2.70GHz
OCZ EL GOLD Dual Ch DDR540 512MB X 2 (CL 2-2-2-8 @ 1T).
DFI LAN Party nF4 Ultra- D

My Extreme Custom Water Cooling Review
http://www.geocities.com/nt300/WCReview01.html
http://www.ntmultivitamin.com
http://www.geocities.com/superxpfx/VideoBoyPC

[Urlyin]

Can the X800 XL be flashed into a X800XT /PE or X850XT /PE ?

Also, instead of the pensil MOD, can you just use a little wire for connecting & use heat glue to hold it in place? Anyway, I havent turned on the PC yet until I get an answer. Thanks.



--------------------------
Athlon 64 3200+(90nm)@ 2.70GHz
OCZ EL GOLD Dual Ch DDR540 512MB X 2 (CL 2-2-2-8 @ 1T).
DFI LAN Party nF4 Ultra- D

My Extreme Custom Water Cooling Review
http://www.geocities.com/nt300/WCReview01.html
http://www.ntmultivitamin.com
http://www.geocities.com/superxpfx/VideoBoyPC

Super ... NOOOOOO!!!!!!! ... just a wire will short it out ... all the pencil mod does is lower the resistence to increase voltage ... just a wire does not work!!!

[ReconCX]

... what is that box on top of your computer? lol ^_^

[Urlyin]

... what is that box on top of your computer? lol ^_^
Cooler for has water rig ..

[Super XP]

Cooler for has water rig ..


Thank You Urlyin,

This is why I did not turn on my PC yet until I get an answer from you guys. O.K. I will take out the Wire's & heat Glue & either do a pencil Mod or use a Variable Resistor & follow the Instructions given.

Oh, that box is my custom made Radiator Reservoir. It tends to keep the RAD nice & cool. But I am not yet finished with it. ;)

I'll post back with my results.
Thanks Again.

Here is an Older Pick of it.................................

http://img182.exs.cx/img182/451/mvc003s3xp.jpg

[Super XP]

Can the X800 XL be flashed into a X800XT /PE or X850XT /PE ?

[Urlyin]

Can the X800 XL be flashed into a X800XT /PE or X850XT /PE ?

They have different cores Super.. I don't think it would work...

[Super XP]

They have different cores Super.. I don't think you it would work...

O.K. Cool.

Reason I am asking is because on the GPU itself, it says X800 Pro but the Graphic's Card is X800 XL, that is why I was asking.


Thanks Guys.

[Urlyin]

O.K. Cool.

Reason I am asking is because on the GPU itself, it says X800 Pro but the Graphic's Card is X800 XL, that is why I was asking.


Thanks Guys.

Super read through this thread (http://forums.techpowerup.com/showthread.php?t=2218)

[Urlyin]

How high can I go on the Memory voltage VDDQ and Vdimm for an x850xt pe?

I think they are 2.1v by default. I am at 2.2v on each. I have them sinked with lots of air flow. Can currently run at 651mhz.

Any recommendations?

musk

I'd hold up there Musk ... 651 on mem is flying ... done any benching yet?

[Urlyin]

yep i know that but what the measuring result should be (about)??

Day ... how are you making out?

[musk]

I'd hold up there Musk ... 651 on mem is flying ... done any benching yet?

Urlyin,

I have done some benches.

05 Here (http://service.futuremark.com/compare?3dm05=696343)
03 Here (http://service.futuremark.com/compare?2k3=3820810)

I reread the main article and it says up to 2.45v for VDD. Is that right?

Thanks for the respone.

musk

[Urlyin]

Urlyin,

I have done some benches.

05 Here (http://service.futuremark.com/compare?3dm05=696343)
03 Here (http://service.futuremark.com/compare?2k3=3820810)

I reread the main article and it says up to 2.45v for VDD. Is that right?

Thanks for the respone.

musk

Musk 2.45v is extreme and will produce some hot RAM chips so do be careful .. Again you'll be at the edge so take care ....

Your benchmarks are smokin and on top of the DFI runing stock 200 FSB (nice board) :D
It also says in the article to find a stopping point and not to over do it .... you might want to try to OC that NF4 DFI MOBO and that'll help in increasing your score ;)

[AllBrain]

Yesterday I decided to finally buy a multi-meter for myself. So armed with my new multi-meter, knowledge from fellow voltmodders and tech docs, I started to work on my graphics card. Since I do not have the same PCB layout than the other makes, I had to some improvising. So here is what I did...

1. I used the same voltage measuring points than the above guide and found the following to me true:
Vgpu - 1.36V
Vdd - 2.05V
Vddq - 2.05V

2. Now I used the knowledge and tech docs I have acquired to find the right resistors to penci downl. At this point I did not know which of the two IC’s controlled what. So I started with the RT9214 IC and found two resistors connected with Pin 6. (Pin 6 is the one you need to trick by making it think that it is not giving enough voltage by reducing the resistance on the connected resistors.) So I penciled the one resistor down a little and found the Vgpu to stay at 1,36V but the Vdd and Vddq when down to 1.96V. This sounds like a step backwards and it is but at least now I knew which IC controlled what. Next I tried the other resistor on Pin 6 and to my amazement the Vdd and Vddq both went up to 2.10V.

3. Next up is the RT9256 IC. This IC can control two separate devices and thus has two pins that you can fool but since it is only contolling one device, I only had to work with one pin. And that was Pin 4. Once again this pin had two resistors connected to it and like always, I go pencil the wrong one. After kicking myself for reducing the Vgpu to 1.26V, I penciled down the other resistor just a little bit and the Vgpu shot up to 1.48V. Quite a big increase for a small amount of graphite.

And with that I have found the voltmods for my card all by myself. I would like to thank the people that gave my advice and encouragement.

[Urlyin]

Yesterday I decided to finally buy a multi-meter for myself. So armed with my new multi-meter, knowledge from fellow voltmodders and tech docs, I started to work on my graphics card. Since I do not have the same PCB layout than the other makes, I had to some improvising. So here is what I did...

1. I used the same voltage measuring points than the above guide and found the following to me true:
Vgpu - 1.36V
Vdd - 2.05V
Vddq - 2.05V

2. Now I used the knowledge and tech docs I have acquired to find the right resistors to penci downl. At this point I did not know which of the two IC’s controlled what. So I started with the RT9214 IC and found two resistors connected with Pin 6. (Pin 6 is the one you need to trick by making it think that it is not giving enough voltage by reducing the resistance on the connected resistors.) So I penciled the one resistor down a little and found the Vgpu to stay at 1,36V but the Vdd and Vddq when down to 1.96V. This sounds like a step backwards and it is but at least now I knew which IC controlled what. Next I tried the other resistor on Pin 6 and to my amazement the Vdd and Vddq both went up to 2.10V.

3. Next up is the RT9256 IC. This IC can control two separate devices and thus has two pins that you can fool but since it is only contolling one device, I only had to work with one pin. And that was Pin 4. Once again this pin had two resistors connected to it and like always, I go pencil the wrong one. After kicking myself for reducing the Vgpu to 1.26V, I penciled down the other resistor just a little bit and the Vgpu shot up to 1.48V. Quite a big increase for a small amount of graphite.

And with that I have found the voltmods for my card all by myself. I would like to thank the people that gave my advice and encouragement.

Great news AllBrain ... I replied to your message several post back... use ATITool to set the fan to 100% which can lower temps 5c-7c degrees ....

[AllBrain]

Hi Urlyin. I am running on water, so it does not really matter. Thanks anyway...
Here is a pic of the right and wrong resistors to pencil. Green right and Yellow wrong:
http://img.photobucket.com/albums/v313/AllBrain/vMod.jpg

[Urlyin]

Hi Urlyin. I am running on water, so it does not really matter. Thanks anyway...
Here is a pic of the right and wrong resistors to pencil. Green right and Yellow wrong:


... even better ... what speeds are you running at? and what water cooler are you using? I think that's going to be my next project ... goin H20 ... congrats on the vmod and thanks for sharing :D

[Urlyin]

O.K. Cool.

Reason I am asking is because on the GPU itself, it says X800 Pro but the Graphic's Card is X800 XL, that is why I was asking.


Thanks Guys.

I read your water review ... :) nice work ....

[Super XP]

I read your water review ... :) nice work ....

Well, that is great. I really value your Opinion & input.

Thanks for all the help.
Super XP

[Urlyin]

Well, that is great. I really value your Opinion & input.

Thanks for all the help.
Super XP

I was think about getting the Zalman Reserator here (http://www.zalman.co.kr/eng/product/view.asp?idx=63&code=021) which is a okay kit, not for extreme cooling ... but like you I would enjoy creating it myself :) ... more fun that way ... I did pick up some ideas from the article (thanks) ... I have a question about the rad on the top of the box with the fans, from what I can see it's enclosed in the box... so with the fans blowing down where does the airflow go and if reversed where does it pull fresh air from? ...

[Super XP]

I was think about getting the Zalman Reserator here (http://www.zalman.co.kr/eng/product/view.asp?idx=63&code=021) which is a okay kit, not for extreme cooling ... but like you I would enjoy creating it myself :) ... more fun that way ... I did pick up some ideas from the article (thanks) ... I have a question about the rad on the top of the box with the fans, from what I can see it's enclosed in the box... so with the fans blowing down where does the airflow go and if reversed where does it pull fresh air from? ...


It sucks fresh air from the top & blows out the air in the bottom back.

I'm going to cover the front fans with some sort of foam or something to keep away dust from getting into the RAD finns & to control the sound when on Full Speed.

[Urlyin]

It sucks fresh air from the top & blows out the air in the bottom back.

I'm going to cover the front fans with some sort of foam or something to keep away dust from getting into the RAD finns & to control the sound when on Full Speed.

You could use a filter for a house AC/Furnace unit and cut it down to fit ... old house I lived in I had to mod the filters to fit the odd size. I would cut the filter and refit the frame to size ...

[GoLLuM4444]

Ok I tried the pencil mod (vcore) and it did nothing so I tried the VR way. I soldered one end onto one of the empty contacts where there is no resistor (as in the pic) but thought it might be toughing the neighbouring resistor so pulled it to the side slightly. The whole contact came off the pcb along with a couple of surface wires :eek:. Now the solder won't sit in the gap where the contact was and it's all over the resistor next to it instead. Also I managed to pull a capacitor off the opposite side with some neoprene and solder it on at 45 degrees. I think it works though. HELP! Any soldering gurus in the UK who can fix all my problems? Or any advice how to get the solder to stay?

Any help is appreciated.
GoLLuM

[GoLLuM4444]

Phew fixed it with some dodgy soldering. Now to try the mod again ;).

[Urlyin]

Phew fixed it with some dodgy soldering. Now to try the mod again ;).

Gollu... take your time ... you just voided your warranty... you should run some benchmarks and play some graphic intense games before trying to mod it again... PM ViperJohn for some tips ... or send him the card ...

[Unregistered]

Hi, I just wanted to say what a good description for this mod. I've never done a volt mod before and it went off without a hitch! I'm at 1.41v vgpu and 470mhz core stable with ATITool!

[GoLLuM4444]

Gollu... take your time ... you just voided your warranty... you should run some benchmarks and play some graphic intense games before trying to mod it again... PM ViperJohn for some tips ... or send him the card ...
I voided my warranty long ago. I have no chance of RMA as I've hacked up the HSF to fit a Mach 2 on. Also the sub-zero operation of the card voided it a while ago. Much as I'd love to run some benchmarks the Mach 2 has now packed up :mad: and so has my PCI graphics card. Can't use my main computer for some time then... :mad::mad::mad:

[webbyboy]

Urlyin, i guess the problem with me is the reading of the ohms on the multimeter. Possible to elaborate more of reading the the ohms on the multimeter? the 15k laws and etc?

[Unregistered]

I'm @ 1.45v watercooled and seem to get lookups after 476mhz core. Do I need to do the IGPU mod to go any higher?

[DreamH20]

Sorry I was just the unregistered user above... just wanted to show my mod.. :D

http://home.comcast.net/~p.sygowski/images/VMOD.JPG

can't seem to get past 476mhz core though.. :confused:

[GoLLuM4444]

If I'm not mistaken the IGPU mod is to Reduce the current so it doesn't overflow at high voltages like 1.8v. It will not affect the maximum overclock at 1.4v. (Well it won't increase it). Correct me if I'm wrong.

[Urlyin]

If I'm not mistaken the IGPU mod is to Reduce the current so it doesn't overflow at high voltages like 1.8v. It will not affect the maximum overclock at 1.4v. (Well it won't increase it). Correct me if I'm wrong.

There is another name for it but it is known as over volt protection. Which means that the IGPU shuts down the card should it reach a certain voltage. The vmod for the IGPU allows you to go past the default setting... Goolu is correct in that it has no affect on your OC just allows you to crank up the GPU voltage higher ...

Dream if you're using H20 review the Max safe voltage settings in the begining of the article here (http://www.techpowerup.com/articles/overclocking/voltmods/101) you can go higher on the GPU voltage ... nice vmod :)

Webboy ... try reading through the Getting Started in this article here (http://www.techpowerup.com/articles/overclocking/voltmods/101/2).. let me know if that doesn't help or you already read it...

[DreamH20]

So what kind of voltage and mhz are people hitting with this mod???

[daysleeper]

jep i have done this pencilmodding now and i just can't get the vgpu or vdd any higher.I'm using the places that are shown in the pictures at the first page....why nothing happens :confused:

[Urlyin]

So what kind of voltage and mhz are people hitting with this mod???

This can very from card to card and on the cooling used... for the PCI-E cards there are a lot of variants coming out from the OEM manufactors, now we see the same versions coming out on AGP... generally speaking though from my experience a X800XT did 600mhz on the core with only a 1.55v while a X800XT PE could only do 590mhz at the same voltage... the same XT PE would freak out at anything above 628mhz with the VPGU at 1.68v with vertical lines of dark shaded colors, I was told by VJ that it was more than likely a weak shader pipe ... So don't concern yourself too much on what other cards are doing and how high they go because each card is different, so it comes down to trial and error on your part, set a maximum based on your cooling usage and in steps take the voltage up, testing the card for lockups each time... hope that makes sense .. :)

[Urlyin]

jep i have done this pencilmodding now and i just can't get the vgpu or vdd any higher.I'm using the places that are shown in the pictures at the first page....why nothing happens :confused:

Day... have you taken the default readings for voltage and ohms? are you using a 2b pencil?

[daysleeper]

Day... have you taken the default readings for voltage and ohms? are you using a 2b pencil?
jep ,vgu aroun 1,4v and vdd 2,08v and i use same pencil that i used from x800pro@xt vivo penciling and still no result... :eek:

[Urlyin]

jep ,vgu aroun 1,4v and vdd 2,08v and i use same pencil that i used from x800pro@xt vivo penciling and still no result... :eek:

Day ... do you check the ohms on the resistor for the VDD before you pencil and then after?

[daysleeper]

jep and its around 900ohms,R311

[Urlyin]

jep and its around 900ohms,R311
is it after you pencil it?

[daysleeper]

is it after you pencil it?
Before and after,is it the right resistor??.with my x800pro@xt vivo i got vgpu to 1,85v easily but now with this card nothing happens...... :(..i didn't use the vdd mod on my x800pro@xt vivo...

[Urlyin]

Before and after,is it the right resistor??.with my x800pro@xt vivo i got vgpu to 1,85v easily but now with this card nothing happens...... :(..i didn't use the vdd mod on my x800pro@xt vivo...

I just started wih the VDD first... what is the ohm measurement on the VDD chip ISL6522 above the R311 used for the VR mod on pins 5 & 7 ?

[daysleeper]

I just started wih the VDD first... what is the ohm measurement on the VDD chip ISL6522 above the R311 used for the VR mod on pins 5 & 7 ?
you mean between pins 5 & 7?

[Urlyin]

you mean between pins 5 & 7?

Red lead on pin 5 and the black on pin 7 ... should read the same as r311... set to ohms

[Unregistered]

What is VDDQ? do I have to mod it to raise VGPU and VMem?
thanx for reply in advance

[Super XP]

What is VDDQ? do I have to mod it to raise VGPU and VMem?
thanx for reply in advance

Maybe you can define all the terms? :)

[Urlyin]

Maybe you can define all the terms? :)

I'll take that as a suggestion and define those terms as I write the Vmod Article here (http://forums.techpowerup.com/showthread.php?t=2184). Anything else that may be needed in the article? it's based on this one here (http://www.techpowerup.com/articles/overclocking/voltmods/101) your input and suggestions are welcome .... :)

[Derektm]

What is the best x800xl card to get for this mod thats $300 or under? The ATI version ....powercolor version, or what?

Thanks!

[Mussels]

Hope you're still around urlyin.

got me a powercolor X800XL here, and decided to test the voltages rather than the blind way i did it with my X800PRO last time.

stock voltages read off as:

GPU: 1.43V
VDD 1.83V
VDDQ 1.90V

they dont seem to fall in line with whats in the article, so i thought i'd post and see what you think.

OC on these voltages (stock cooler) is 444 / 534

edit: My stable OC seems sporadic and changing every boot (might be room temp changing) so for now ignore the OC numbers.

[Urlyin]

Hope you're still around urlyin.

got me a powercolor X800XL here, and decided to test the voltages rather than the blind way i did it with my X800PRO last time.

stock voltages read off as:

GPU: 1.43V
VDD 1.83V
VDDQ 1.90V

they dont seem to fall in line with whats in the article, so i thought i'd post and see what you think.

OC on these voltages (stock cooler) is 444 / 534

edit: My stable OC seems sporadic and changing every boot (might be room temp changing) so for now ignore the OC numbers.

Sup Mussels :) ... the numbers in the article are just examples... given it covers three different models and of course three different cores ... why it's good to write your default voltage and ohm readings down first, before you vmod. With the wide number of variants coming out from the OEM manufactors deviating from ATI reference builds I'm sure we'll see various readings...

But overall it'll be just like your X800Pro ... take the same precautions and post back with your results ... you did a great job on the Pro, I don't see why you wouldn't again :D

[daysleeper]

jep i sold my connect x850xt and bought club 3d x850xt ....jep and this is the result mark05 (http://service.futuremark.com/compare?3dm05=724614)next is the pencillingtime :rolleyes:

[Mussels]

its a pain in the ass, but i cant get it to work. i blame my pencil.

i tried with VDD and it lowered resistance there, but i erased it (not upto that yet, no ram cooling)

basically i can cover the thing in so much lead that i cant see the gap where the resistor should be, but it doesnt lower the resistance at all. is there a better kind of pencil than a 2B?

[Urlyin]

its a pain in the ass, but i cant get it to work. i blame my pencil.

i tried with VDD and it lowered resistance there, but i erased it (not upto that yet, no ram cooling)

basically i can cover the thing in so much lead that i cant see the gap where the resistor should be, but it doesnt lower the resistance at all. is there a better kind of pencil than a 2B?

Well I've seen a couple of people say the same Mus ... But there are many that have it working ... with the card out check the ohm reading with the red lead on pin 17 of the 5420 and the black on ground... check the solder pads for the same reading or any resistor that is along the trace from pin 17 that match that ohm reading ...

[Mussels]

i used the ones in the pics, and no matter how much lead i used i cannot lower it. if you know of another pic with other resistors to try, or a reccomendation for a more resistant pencil, let me know...

[Urlyin]

i used the ones in the pics, and no matter how much lead i used i cannot lower it. if you know of another pic with other resistors to try, or a reccomendation for a more resistant pencil, let me know...

But did you check the readings in the last post ..

[Urlyin]

jep i sold my connect x850xt and bought club 3d x850xt ....jep and this is the result mark05 (http://service.futuremark.com/compare?3dm05=724614)next is the pencillingtime :rolleyes:

Not a bad score ... 6754 for a stock card ... :)

[Mussels]

no i havent, i find it hard to find anything without a pic pointing to it. i was working with w1zz to find another measure point because it seems the resistance is too low on some cards for a pencil to have an effect... ask w1zz if he's found anything

[Urlyin]

no i havent, i find it hard to find anything without a pic pointing to it. i was working with w1zz to find another measure point because it seems the resistance is too low on some cards for a pencil to have an effect... ask w1zz if he's found anything

well that bites... will do..

[daysleeper]

Not a bad score ... 6754 for a stock card ... :)
Jep i thought that there is no reason to change connect to club but this time it payed the price.In mark03 the was lot of artifacts in this score ..mark03.. (http://service.futuremark.com/compare?2k3=3849222),but in mark05 not soma many....weard.Next i will try to do the pencilmods for vgpu and vdd and i hope they'll work better than in connect-card :o

[GoLLuM4444]

Ok I'm still fixing a cock-up. Could someone with a working card please check whether in the second picture (the 1st detailed one (for the vgpu mod)) the bottom righ leg and the two above it of the big chip in the center should have 0 resistance between them. Your help is much appreciated.

[Urlyin]

Ok I'm still fixing a cock-up. Could someone with a working card please check whether in the second picture (the 1st detailed one (for the vgpu mod)) the bottom righ leg and the two above it of the big chip in the center should have 0 resistance between them. Your help is much appreciated.

Gollu ... count the pins out ... which pins

[GoLLuM4444]

Gollu ... count the pins out ... which pins
15, 16, 17 if you count in this fashion:

http://www.kpsec.freeuk.com/images/icpins.gif

[GoLLuM4444]

Okay I borrowed a friend's card and sorted out what goes where. It was a bit of a mess but I think I've got it. What is the default reistance between the 2 pads on an x850xtpe for the vgpu mod?

[Urlyin]

Okay I borrowed a friend's card and sorted out what goes where. It was a bit of a mess but I think I've got it. What is the default reistance between the 2 pads on an x850xtpe for the vgpu mod?


it can vary from card to card but if you measure the resistence from pin 17 and ground on the 5420 to the left of the solder pads should be correct

[GoLLuM4444]

5240 u mean :p
And what do you mean? You say that if I measure it at all it will work?

[daysleeper]

still same,i can't get these pencilmods working.i have scratched with pencil like hell but no raise on volts.cgpu stays at 1,4V and vdd 2,09V....damn :confused: ...i scratch r311 for vdd and between 2 solderpads for vgpu....

[Mussels]

its because the resistance is so low between those points, the pencil has no effect. w1zzard is working on new points to try, but he's waiting on a PCI-E card to test it all out on.

patience should help us out here, i say wait for him.

[W1zzard]

i say dont wait and try things yourself .. the chance that i find some points is very small

[Mussels]

and im sure the odds on me stabbing my card with a pencil helping my OC are great. [/sarcasm]

we need someone with a clue to do this, urlyin?

[SIK_L_CELL]

I found a beauty of a card here. I only have the Vcore and Vmem at 1.65 and 2.16. On ambient water. $450 Sapphire X850xt non pe. The clocks for 05 are 714/645, and 03 is 711/654.

3DMark 05 - 8152 (http://service.futuremark.com/compare?3dm05=743883)

3DMark 03 - 17169 (http://service.futuremark.com/compare?2k3=3868372)

[daysleeper]

I found a beauty of a card here. I only have the Vcore and Vmem at 1.65 and 2.16. On ambient water. $450 Sapphire X850xt non pe. The clocks for 05 are 714/645, and 03 is 711/654.

3DMark 05 - 8152 (http://service.futuremark.com/compare?3dm05=743883)

3DMark 03 - 17169 (http://service.futuremark.com/compare?2k3=3868372)

modded or did you use pencil??

[Urlyin]

I found a beauty of a card here. I only have the Vcore and Vmem at 1.65 and 2.16. On ambient water. $450 Sapphire X850xt non pe. The clocks for 05 are 714/645, and 03 is 711/654.

3DMark 05 - 8152 (http://service.futuremark.com/compare?3dm05=743883)

3DMark 03 - 17169 (http://service.futuremark.com/compare?2k3=3868372)

Go Sik .... :D

[Urlyin]

5240 u mean :p
And what do you mean? You say that if I measure it at all it will work?

I was trying to tell you how to get the default resistance ....

[Urlyin]

and im sure the odds on me stabbing my card with a pencil helping my OC are great. [/sarcasm]

we need someone with a clue to do this, urlyin?

Mussels can you verify that that the VDD and VDDQ work ... it appears Daysleeper is having issues there as well .... which he should not be, because the vmods there are on resistors .....

I've tried a couple of things and they did not work any better than the pencil .... hang in there Mussels :)

[Mussels]

i just got my ATI silencer 4 rev 2, so i'll take a crack at it tomorrow.

get him to measure his defaults, so we can compare with the ones i posted earlier.

[SIK_L_CELL]

I did the hard mods.

[Mussels]

just succesfully did the VDDQ mod from 1.90->1.97V

doing VDD and doing a few tests later tonight, but yes the pencil mod seems to work on VDDQ ( 852 ohms -> 819ohms, 2B pencil)

[daysleeper]

just succesfully did the VDDQ mod from 1.90->1.97V

doing VDD and doing a few tests later tonight, but yes the pencil mod seems to work on VDDQ ( 852 ohms -> 819ohms, 2B pencil)
So what is the reason to do that mod??.

[Mussels]

read the info in the main page for this mod, and the info for previous volt mods.

the reason i'm testing these is that some of us seem to have boards that cant mod certain things, and w1zzard doesnt have one of these boards to test with so i'm looking things up for him and urlyin.

edit: reducing resistance of the VDD DECREASES voltage. so you'd need to increase resistance, which is impossible for a pencil mod.

so urlyin, either find a new readout point, or a new pencil point... cause currently only VDDQ is pencil moddable.


edit: 2
Whats REALLY weird is that undoing the failed VDD mod (due to lower voltages) has reduced my OC!

i think its just reading the voltage wrong, and really is having an effect on OC. i'd like someone else to confirm this, i dont have the time to do it right now.

[W1zzard]

are you sure that penciling resistor r311 reduces vdd voltage?

one side is connected to ground and the other one to vsense+ so reducing resistance should drop the sensed voltage which means the vregulator pumps out more voltage

[Mussels]

using the points in the guide, the measure point did indeed lower in voltage. however, OC increased. personally i think its just that we need another measure point for VDD

[Urlyin]

So what is the reason to do that mod??.

Day ... it increases the memory OC ...

[Urlyin]

using the points in the guide, the measure point did indeed lower in voltage. however, OC increased. personally i think its just that we need another measure point for VDD

increasing the VDDQ does more for the memory OC than the VDD ... so increasing the VDDQ may be why the OC increased ...

[Mussels]

i raised VDDQ and VDD, then ran the rig, checked voltages. did ATItool tests for max OC and powered off. i then un-did the VDD mod beleive it to be undervolting the card, and lost OC regardless. so unless my card loves lower volts, something weird is going on.

[HousERaT]

Hello folks.... my card is a Rosewill X800XL card. It's one of the cheapest at Newegg.com. I'm cooling the card with an ATI Silencer 5 Rev2. My stable overclock of 425/535 gets the core up to 50° under load. What voltages would you folks suggest I use to pencil voltmod my card considering the cooler I'm using?

VGPU?
VDD?
VDDQ?

[Mussels]

i used an ATI4 rev 2. myself, heres my way.

remove the ram backplate for now and hold the front on with elastic bands (make sure the card still fits in teh AGP/PCI-E slot) and look closely at the pencil / volt mod points. measure and write down the stock resistance, and making 300% sure not to loosen the front part of the cooler, install the card and power up the system, get into the BIOS and just check the stock volts.

once you do that, take it out, lower VDDQ and VGPU by approx 30 ohms (or less, not over) and test again to see the voltage change.

you can do the same with VDD, but the end voltage must NOT go above the VDDQ voltage, so do it first.

and as i said earlier, if you notice VDD drop in volts, try the OC anyway. mine OC'd more regardless of the volts dropping.

[daysleeper]

increasing the VDDQ does more for the memory OC than the VDD ... so increasing the VDDQ may be why the OC increased ...
well i'll try to do the pencil omd for vddq add hope i can get ovet 620 for memory....

[Mussels]

VDDQ is the boards voltage, but VDD (ram volts) cant go above it. so raise VDDQ til you think its enough, then raise VDD, but keep the volts under VDDQ.

[HousERaT]

VDDQ is the boards voltage, but VDD (ram volts) cant go above it. so raise VDDQ til you think its enough, then raise VDD, but keep the volts under VDDQ.

since we're running about the same system what voltages did you end up with or did you remove the mods?

what did you gain in oc from the mods?

[GazC]

I don't want to sound negative, but does the pencil mod actually work with the 850? I don't want to use a soldering iron again if I can help it, after what I did to my x800.

Reading this thread does not seem to give convincing results.

[Mussels]

houserat: i mentioned them earlier in the thread, except VDD which didnt work anyway. (if i DIDNT mention it, i'll add it in later. had my HD corrupt and need to get my notes off it)

lower by 30 omhs for a safe start.

gazC: VDD / VDDQ seem to work, VGPU doesnt seem to. it DOES for some people, the cards differ a little.

[daysleeper]

VDD 2,09V
VDDQ 2,09V
i can't get these up,when i measure the resistance i can't get reading it changes all the time.Jep i have use the pencin but no change in the volts....i hate this :mad:

[Mussels]

make sure to measure it the same direction each time, certain resistors will only work with the black lead on one side of them, and some have a different reading if you swap the leads (black and red) around.

[Unregistered fire113]

Hi guys

what is the max Volt on DD&DDQ? I have an x800xl club 3d & samsung 1,6ns. Can I use the same Volt´s for it like 2,0 ns ram???---> watercooled vdd 2,1-2,45Volt and what is the max of VDDQ? is it the same like VDD???

cu fire113.

http://service.futuremark.com/compare?2k3=3867855

[12k^]

Anyone tryed with PowerColor x850XT / XT PE...

(x850XT Im using)

And...

VGPU / IGPU mods is the only I dare making,.. I use very poor airflow in my tower and keeps most of it aircooled... I use aluminium heatsinks for mem on gfx... and watercooling on CPU / GPU...

I'd like to go for the 1,6 - 1,65v instead of the stock ~ 1,4v...

Im able to run a speed of 605 mhz core without artifacts but freezes after a while under load... - I guess its a due to my PSU but... I'll change PSU soon...
Anyways... Im able to clock to 625mhz core but with lots of artifacts... - Daily usage the corespeed is 588mhz..

Anybody's able to help me out with the measuring points? - If pencil mod is possible... :)

Best regards
12k

[funkflix]

Works fine so far, all stock. 16000 '03 i come! ;D

http://weber-steuerungstechnik.de/felix/850mod1.jpg

http://weber-steuerungstechnik.de/felix/850mod2.jpg

[Mussels]

:O nice work man

i often screw up pencil mods, so thats pretty good work there.

nice pics tho, they make it seem easier to understand.

[Urlyin]

Anyone tryed with PowerColor x850XT / XT PE...

(x850XT Im using)

And...

VGPU / IGPU mods is the only I dare making,.. I use very poor airflow in my tower and keeps most of it aircooled... I use aluminium heatsinks for mem on gfx... and watercooling on CPU / GPU...

I'd like to go for the 1,6 - 1,65v instead of the stock ~ 1,4v...

Im able to run a speed of 605 mhz core without artifacts but freezes after a while under load... - I guess its a due to my PSU but... I'll change PSU soon...
Anyways... Im able to clock to 625mhz core but with lots of artifacts... - Daily usage the corespeed is 588mhz..

Anybody's able to help me out with the measuring points? - If pencil mod is possible... :)

Best regards
12k

Look at the first page of this thread ..

[Urlyin]

Nice Grave ... where'd you get those VRs

[funkflix]

Thx. :)

From http://www1.conrad.de/scripts/wgate/zcop_b2c/~flN0YXRlPTEzOTEzNDY4OTM=?~template=pcat_area&p_load_desc=X&p_load_area=241630

[12k^]

#153

Done that... But my gfx looks a bit different... :\

[Tom2110]

my problem is the same! i do the vGPU mod and the 1.41V isn´t going up!

I have the right points with the pencil!
I have a x850xt PCIe

who can help me?

[Urlyin]

#153

Done that... But my gfx looks a bit different... :\

Have a pic?

[Urlyin]

my problem is the same! i do the vGPU mod and the 1.41V isn´t going up!

I have the right points with the pencil!
I have a x850xt PCIe

who can help me?

Tom it's an issue with the new design that ATI has come out with and not needing the resistor... which results in the pencil not being able to lower the ohms... I have something that Daysleeper will be testing out to see if it's able to lower the ohms of the two solder spots .... I'll let everyone know if it works ...

[12k^]

Got a mate to upload it, as well he made some guesses where it could be....

http://www.hardware-test.dk/oc/billedbrowser.asp?id=23219&pic=4

Can you confirm?

Best regards 12k

[Urlyin]

Got a mate to upload it, as well he made some guesses where it could be....

http://www.hardware-test.dk/oc/billedbrowser.asp?id=23219&pic=4

Can you confirm?

Best regards 12k

12 ... I don't see the diff? just the color is different the mod is in the same spot ... you lost me

http://www.techpowerup.com/articles/112/images/vgpu.jpg

[12k]

The "thing" just right of the C1691 is missing.. :\

Does that do any difference?

Btw... How much vgpu should I give the core - Is 1,65v safe?

[Urlyin]

The "thing" just right of the C1691 is missing.. :\

Does that do any difference?

Btw... How much vgpu should I give the core - Is 1,65v safe?

The vmod would be the same for the VGPU ... does your board have a resistor where W1zz shows the resistor solder points? are you doing the VR ? Depending upon the cooling you're using would determine if 1.65v would be safe ...

[fire113]

The "thing" just right of the C1691 is missing.. :\

Does that do any difference?

Btw... How much vgpu should I give the core - Is 1,65v safe?

hi

I miss the "thing" too but I can do all the Vmods :)
I went up to 1,75 Volt on GPU an the Card is sill alive ;), but now I´m using 1.63Volt.

cu fire113.
http://service.futuremark.com/compare?2k3=3867855

[12k]

Hmm, soldering points ?
Measuring points aye?

Aint it possible with pencil?

[babyelf]

Set your meter to DCV 20 V before placing the black lead of your meter on the screw holding in the video card, this is ground..

erm... sorry.. this is a noob question.. but where does this refer to?

i'm choosing between getting a x800xl or a x850xt now.. if i get x800xl i'm closer to watercooling my rig... if i get the x850xt then i'm further from watercooling my rig...

do we measure and pencil when the system is up and running?

[Urlyin]

Set your meter to DCV 20 V before placing the black lead of your meter on the screw holding in the video card, this is ground..

erm... sorry.. this is a noob question.. but where does this refer to?

i'm choosing between getting a x800xl or a x850xt now.. if i get x800xl i'm closer to watercooling my rig... if i get the x850xt then i'm further from watercooling my rig...

do we measure and pencil when the system is up and running?

Read this article here (http://www.techpowerup.com/articles/overclocking/voltmods/101) ... to get a understanding of what to do... the x800/ x800xl vmods are based on that article

[Urlyin]

Hmm, soldering points ?
Measuring points aye?

Aint it possible with pencil?

Some members are having problems getting the pencil to lower the ohms on certain boards... you may or may not have the same issue ... read the same article I pointed Babyelf to and then go to the first page of this thread for the vmod locations for your card ...

[babyelf]

Hi

I read it ... just that i don't know where is ground....

can you show me where to have the black from the DMM touch?

[Urlyin]

Hi

I read it ... just that i don't know where is ground....

can you show me where to have the black from the DMM touch?

It states in the article ... Set your meter to DCV 20 V before placing the black lead of your meter on the screw holding in the video card, this is ground.

Do not pencil the card while it is in the slot ....

[Tijgert]

To narrow down the succes rate and the work I have to do, does anybody here have any reports on the mod on a Club3D X800XL with 2ns ram?
Or perhaps what the stock voltages/resistances are and perhaps to what values they were altered and what the result was.

(best case scenario, I just pencil in the resistance and presto, 5 minute mod is done without any trial and screwup)

Also; what exactly is 'electrical tape'? Can't I just use ye olde stickytape? Must it have some special properties?

[Mussels]

if you have no resistor, pencil mods dont work. urylin is working on an alternative.

you cant use someone elses numbers, each card is different. and you need to measure how much you changed anyway, duh.

electrical tape: i jus tused duct tape. you need something that wont melt if your card gets hot ;)

[Tijgert]

If the pencil mod wouldn't work... the resistor hard mod would, right?

[Urlyin]

If the pencil mod wouldn't work... the resistor hard mod would, right?

The hard mod works ...

[Urlyin]

I'm looking for a volunteer to run some test on their x800 or x800xl without the resistor ... I'll walk you through doing the VGPU vmod to verify a different way of doing the mod... it doesn't involve a VR or soldering... I've tested it on a X800XT AGP but I don't have access to a X800XL or X800 PCI-E card ... just send me a PM if you're interested ...

[12k]

One final noob question from me.... What is electrical tape??...

Got red PCB layout,,,, :\ - And where can i buy it ?

[Tijgert]

[stepping up to the plate] Pick me pick me!!

I'm volunteering to destr.. eh.. experiment with my resistorless Club3D X800XL :)

Just tell me what to do in the utmost detail and we'll see what this puppy can do.

[Tijgert]

I see several pictures of parts only, but no pictures of the whole project.
What exactly did you do?

[Tijgert]

Ah... interesting. Just to check if I understand completely: the lower resistorless island would be the ground and it's senseless to try and put a wire on another tiny island so close to the other if you can just hook it up the ye olde ground of the backplate, right?

Will you leave it at 0.02v difference or do you plan to ramp it up later?

[Tijgert]

It would be very handy to know about the other soldering points if there are others that are grounded.
It would reduce the number of possible foobars when using liquid metal on tiny tiny surfaces.

Oh... and I volunteered my resistorless x800xl for experimenting... but this offer expires once the watercooling is in place, I won't take it all apart again.

Please tell me what to do...

[fire113]

Watercooled ???


Yes ;)

http://www.salzgitter-net.de/hgs/sommerfertig.jpg

cu fire113

[fire113]

Watercooled ???


Yes ;)


http://www.salzgitter-net.de/hgs/sommerfertig.jpg

cu fire113

[Unregistered]

If i understand, there is no solution for resistorless PCB so pls find it or i kill my dad :) I want at least 450Mhz on GPU ...

[danikd]

VDD PMod done, 2.4V - scanning with atitool - only 547Mhz ( normal 2.02V - 544Mhz ) ...
Where is prob ? mem with heatsinks from Zalman VF600 ... they are hot, so voltage is realy higher then normal ... i have only VDD mod done, not VDDQ ? Any sugestion ? THX

[Urlyin]

VDD PMod done, 2.4V - scanning with atitool - only 547Mhz ( normal 2.02V - 544Mhz ) ...
Where is prob ? mem with heatsinks from Zalman VF600 ... they are hot, so voltage is realy higher then normal ... i have only VDD mod done, not VDDQ ? Any sugestion ? THX

You need to do the VDDQ as well ...

[danikd]

THX for your reply and pls any recommendation for vddq and vdd volts ? In article is for VDD cca 2.45V but for VDDQ nothing ( only stock voltage ). Thanx again.

PS:Sorry for my ENG language :o

[Urlyin]

THX for your reply and pls any recommendation for vddq and vdd volts ? In article is for VDD cca 2.45V but for VDDQ nothing ( only stock voltage ). Thanx again.

PS:Sorry for my ENG language :o

You may want to run the VDDQ .03v-.05v higher than VDD ...

[fire113]

hi

@ Urlyin

I have a x800xl/club 3 D/1,6ns samsung 256mb
??? can I use the same voltage (the article) for it on vdd and vddq ???

I went up to ~1,75 V on vgpu to hit ~510 on GPU, on VDD ~2,1V and VDDQ was a little lower ~1,98V. I get ~621 on ram. I won´t use more volts on VDDQ because I not sure with it.

kind regards fire113.

[Mussels]

Someone that have done testing, can poste a table Resistance----->VOLT ? Thank You


we cant, its different for every card.

[Mussels]

neighter a "range" ? starting resistance, starting voltage. etc etc

i beleive some were mentioned in the original article, and i know i mentioned my numbers a few pages back.

[Urlyin]

neighter a "range" ? starting resistance, starting voltage. etc etc

LMP all you would need is the default resistance and since you have done the Hardmod then you would adjust voltage with the VR... I know what you are thinking by wanting the numbers to be able to set your resistance to match a certain voltage but like Mussels said it is a little different for each card... You can use the default resistance to gauge your voltage but it will not be exact... for every 15ohms you reduce the resistance, you'll increase the voltage by .04v-.05v ... so if your default resistance was 430ohms and you reduced the resistance by 30ohms, then your voltage should have increased by .08v ... or by monitoring voltage while the card is on, turn the VR a little at a time to get to the voltage you want ..

[fire113]

@ Urlyin

I have a x800xl/club 3 D/1,6ns samsung 256mb
??? can I use the same voltage (the article) for it on vdd and vddq ???

I went up to ~1,75 V on vgpu to hit ~510 on GPU, on VDD ~2,1V and VDDQ was a little lower ~1,98V. I get ~621 on ram. I won´t use more volts on VDDQ because I not sure with it.

@ LMP ~40°C with wc ;)


kind regards fire113.

[Urlyin]

Hi fire, think tha 1,75 it too much also with water cooling.

Do you tested OCability Vs voltage? does it always go up with vcore or you noticed a plateau?

1.75v should be okay for watercooling ... but LMP has a good point ... some cards react well with more voltage and some cores just won't ... my last XT PE would wack out to a vertical lines after I tried to oc higher than 628mhz and raising the voltage did not help. So again each card is different with the one I have now raising the voltage from 1.68 to 1.75 only got me from 630mhz to 640mhz... which does little for FPS in a game.. you'll find some cards have a sweet spot at which it performs better at than even a higher mhz ...

Fire113 I'd bump the VDDQ up a little and play some games ... Samsung memory specs state that the VDD should be higher than VDDQ ... however every ATI card I've seen the default was VDDQ higher ...

[12k]

Hmm, gonna get my card modded later this week...

Will 1,65v be perfect??
I use watercooling atm... BUT... Im gonna get a waterchiller soon, so It'll be a bit colder... Currently my temps can reach 53 LOAD on GPU while CPU + GPU is in "burn" mode... After 12 hours (delta max)

[fire113]

1.65v is ok with water You will get ~500 clocks on GPU but My temps are lower ~35-40°C under load.

@Urlyin what I ment is --> can I go up to ~2,45 V on VDD&VDDQ? with 1,6ns ram not 2.0 ???

cu fire113.

[12k]

I got x850XT, so hope It'll get me a bit more ;) - 520 is stock :P

[Urlyin]

1.65v is ok with water You will get ~500 clocks on GPU but My temps are lower ~35-40°C under load.

@Urlyin what I ment is --> can I go up to ~2,45 V on VDD&VDDQ? with 1,6ns ram not 2.0 ???

cu fire113.


Fire ... with decent Ram sinks you could run at 2.45v with 1.6ns mem ... but at 2.1 you're already getting 621mhz ... bump the VDD up to 2.20 and the VDDQ to 2.23 ... will get you to at least 630mhz ... unless the GPU will go higher, then any higher on the mem wouldn't do you much good in terms of OCing ... test those settings :)

[Unregistered]

Fire ... with decent Ram sinks you could run at 2.45v with 1.6ns mem ... but at 2.1 you're already getting 621mhz ... bump the VDD up to 2.20 and the VDDQ to 2.23 ... will get you to at least 630mhz ... unless the GPU will go higher, then any higher on the mem wouldn't do you much good in terms of OCing ... test those settings :)



http://www.salzgitter-net.de/hgs/sommerfertig.jpg

I´ll try

[Urlyin]

... hehe ... I saw that pic and forget it was you Fire .... :)

[Tijgert]

Cool ram coolers, care to elaborate? Who's are they?

[fire113.]

QUOTE=Urlyin]Fire ... with decent Ram sinks you could run at 2.45v with 1.6ns mem ... but at 2.1 you're already getting 621mhz ... bump the VDD up to 2.20 and the VDDQ to 2.23 ... will get you to at least 630mhz ... unless the GPU will go higher, then any higher on the mem wouldn't do you much good in terms of OCing ... test those settings :)[/QUOTE]


:( semms to be the max. of My card, with 2.2VDD & 2.23VDDQ I can´t get higher :(
went back to 2.1 VDD 2.13 VDDQ
I don´t understan the "Phase change: ~1.85V"???

what do I have to do that I can use 1.85 on GPU???


cu fire113.

[Urlyin]

QUOTE=Urlyin]Fire ... with decent Ram sinks you could run at 2.45v with 1.6ns mem ... but at 2.1 you're already getting 621mhz ... bump the VDD up to 2.20 and the VDDQ to 2.23 ... will get you to at least 630mhz ... unless the GPU will go higher, then any higher on the mem wouldn't do you much good in terms of OCing ... test those settings :)


:( semms to be the max. of My card, with 2.2VDD & 2.23VDDQ I can´t get higher :(
went back to 2.1 VDD 2.13 VDDQ
I don´t understan the "Phase change: ~1.85V"???

what do I have to do that I can use 1.85 on GPU???


cu fire113.

Have you done the IGPU or overvolt protection mod?

[fire113]

:( semms to be the max. of My card, with 2.2VDD & 2.23VDDQ I can´t get higher :(
went back to 2.1 VDD 2.13 VDDQ
I don´t understan the "Phase change: ~1.85V"???

what do I have to do that I can use 1.85 on GPU???


cu fire113.

Have you done the IGPU or overvolt protection mod?


Yes I did -20 on IGPU from 1400 to 1380. That is all??? I thought I have to change -to+ or vice versa or something like that. Yesterday I tryed 1,78 V but I was scared and went back to 1,667V.

Ok I don´t have to cahange anything? right --> I only have to do the IGPU mod? right???
then I can use up to ~1.85??? am I right?

cu fire113.

[Mussels]

"phase change" is cooling, its a type of cooler that runs sub-zero temperatures, below freezing point usually.

so 1.85V phase change means dont do this if you're on air or water cooling.

[fire113]

ok thanks a lot.

cu fire113

[danikd]

Hi, so nay functional pencil VGPU mod? Or still nothing? Thx

[fire113]

Hi @ all


...I can go up to 510 GPU & 625ram :) with~ 1,65V on GPU and ~2,1V on VDD/VDDQ :)
The Key is the Temperature!!! Outside we have ~8°C @ 22.45. My CPU is running @15C° Idle and 18°C on GPU. With load I have 31°C on GPU.

cu fire113

[Tijgert]

Hello there fella's, here's my report on the VoltMod.

I started out with a Club3D X800XL with 256MB of 2,0ns ram.
Standard the core would show artifacts at 450MHz, so I kept it at 440... but wanted more :cool:
The mem was of surprising quality and was running happily without any mods or cooling at 580MHz... I didn't hit the ceiling yet :eek:

So, the list-'o-facts:
Before the mod:

Vdd = 1.81 v
Vddq = 1.88 v
Vgpu = 1.41 v
RVdd = 1140 ohms
RVddq = 850 ohms
RVgpu = 436 ohms
RIgpu = 39.2 Kohms

After the mod:
Vdd = 1.952 v
Vddq = 1.999 v
Vgpu = 1.671 v

Below I will list only the value of the resistors that I added, you can calculate yourself what the actual resistance and Delta resistance on that spot is.

RVdd = 10.5 Kohms
RVddq = 14.45 Kohms
RVgpu = 2.29 Kohms
RIgpu = 250 Kohms

The Igpu resistor I left at 250 K because the GPU didn't crap out at 1.671 v.
Even adding the 250 K will lower the overal resistance so it nudged a little in the right direction anyway.

The pics!

Here it all begins, multimeter, tools, glasses and spare hard drives... just in case :)

http://www.xs4all.nl/~eikelman/projects/x800mod/1begin.jpg

Prepared the connectors for the resistors, so that they may be removed and installed when needed (I hate permanent solder mods).
In the top left corner you can see the WC blocks, ready for mounting when my Venice comes in :p .

http://www.xs4all.nl/~eikelman/projects/x800mod/2snipsnip.jpg

Thos tiny little islands are too friggin... tiny!!! :mad:
But seemed to work...

http://www.xs4all.nl/~eikelman/projects/x800mod/3tiny.jpg

Soldering to the chips was a lot easier, just hope no crap flowed under the chip...

http://www.xs4all.nl/~eikelman/projects/x800mod/4mem.jpg

This is how the connectors are mounted and how the resistors will be inserted into them.
You may wonder how I will keep them apart...

http://www.xs4all.nl/~eikelman/projects/x800mod/5premount.jpg

Well, like this! Some stripes to identify what goes where... simple as can be!

http://www.xs4all.nl/~eikelman/projects/x800mod/6mounted.jpg

And this was the final setup.
Testing per resistor was easy, just put in little blue block, turn on pc and measure.
While the pc was on I adjusted the screw and saw the voltages change to what I wanted.

http://www.xs4all.nl/~eikelman/projects/x800mod/7adjusting.jpg


I'm sure the voltages can go higher with some fiddling and trying, but right now I'll leave it at a safe setting (at least I think it's safe :confused: ).
Benches will follow after all work is done :)
Until the WC and ramsinks will be installed I removed the resistors not to stress it too much, obviously I won't just leave it running with the mod 24/7 sans cooling :cool:

Oh, while you're at it, why not take a look at my WC setup!
It's at My WC project (http://www.xs4all.nl/~eikelman/projects/watercooling/)
Forgive the crappy HTML, modding is my game, not art :cool:

Qustions? :cool:

Urlyin: Sorry for not trying the graphite mod... :o

The next thing I am working on is to make the mod switchable!
I had a LCD display switchable with a signal from the printerport, but it's not stable or reliable enough to try it here, but a normal switch could do the trick! (switching 3 seperate rails with 1 flick of course)... working on it ;)

[Urlyin]

Nicely done Tijgert .... especially the connectors for the VRs.... How come no one uses shrink tubing on the wires .... I think that would dress it up a little ....

[Tijgert]

Thank you. There's actually a very good reason not to use shrink tubing... Flexibility.

The contact points on the pcb are positively tiny and any error in soldering may be fatal.
Therefor the soldering needs to be of equal small and delicate size which means lesser strength than just dumping a big 'ol glob of solder on it.
Bending and pointing the second contact wire, when held together with shrink tubing, may overstress the c