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Q6600 OC. Look about right?

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Got my Q6600 G0 yesterday and played around with overclocking it last night. Sure runs hot compared to the E8400 that I replaced. I seem to be on the exponential part of the heat curve where adding .0125V causes a noticeable temp rise.

At stock, on my WC setup I was only hitting about 35C on the cores @1.208 (Prime95 small FFT). By time I got it Prime95 stable at 450X8 = 3.6GHz I needed 1.44V and under load I am seeing 65C on the cores :eek:

Since this was a quick OC I was not too methodical with my other voltage settings. I just targeted 3.6GHz stable and then thought I could back off on some of the other voltages. I included some shots of my BIOS settings. Any suggestions on improvements?

Thanks
 

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65'c on watercooling? wtf? Think I would put the 8400 back in it.
 
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Checked your stability THOROUGHLY ? Otherwise sounds about right.
 
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Checked your stability THOROUGHLY ? Otherwise sounds about right.

Well not as thoroughly as I would like. I only got it yesterday. Ran Prime 95 small FFT's for about 1.5 hours. Then ran folding on my GPU and CPU overnight. Will probably followup with an overnight Prime95 run tonight. I also know form experience that even if I get Prime95 stable there can be other issues. For example on my E8400 I got Prime95 stable at 535X7 only to discover that I had some video card instability as a result (PCIe was locked at 100). I guess the PCIe traffic through the Northbridge to the video was not stable at that high a FSB. Had to raise the multi and bring the FSB back under 500 for video stability.

So I guess after an overnight Prime95 my next step is a looping 3DMark06 run overnight.

Anything else you would suggest?
 
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65'c on watercooling? wtf? Think I would put the 8400 back in it.

Well it is fairly basic WC setup. I also have my Northbridge and video card on the loop with the CPU so that is not helping me. Also, I only run the fans on the rad at 60% to keep things quiet.

To be honest 65C as an absolute worst case does not worry me at all. A more typical value when gaming would be in the 40's so it will realistically never see 60's anyways and even if it did there is tons of margin to Tj max.

The reason I went to a quad was so I can leave folding running on one of the cores and basically have no effect on anything else I am running. Works great.

I moved the E8400 over to another rig on a OCZ Vendetta and it is hitting about 42C @ 1.3V @ 450X8 = 3.6GHz. Not as agressive an OC as on my main rig but it is a cheaper motherboard (P5K-SE) with poor Vdroop. Stability is more important for that machine so I will just leave it at 3.6GHz.
 
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kyle2020

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Check stability using OCCT, that can address all 4 cores much more efficiently.
 
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Check stability using OCCT, that can address all 4 cores much more efficiently.


I have OCCT as well but had not tried it on this particular OC. Is OCCT more stressful than Prime95?
 
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kyle2020

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OCCT is designed for dualies and quads. It can address al 4 cores in one program, rather than running 4 simultaneously. you also get detailed graphical results of temps, voltages and clock frequencies at the end, even if it fails (you hear a loud duck quacking haha).

Give it a try, but im sure it will be better.
 

alexp999

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temps and volts seem a bit high. I have a Q6600 G0 with a vid of 1.3125 and it is 100% stable on 1.35v LLC @ 3.2Ghz. I dont break 60*C on 100% load tests. (i always use OCCT as like kyle says, does all for cores and ram and temps/volts in one prog :D)
 
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OCCT is designed for dualies and quads. It can address al 4 cores in one program, rather than running 4 simultaneously. you also get detailed graphical results of temps, voltages and clock frequencies at the end, even if it fails (you hear a loud duck quacking haha).

Give it a try, but im sure it will be better.

Well it worth it just for the quacking :laugh:

Will fire it up tonight and see if it is migration season...
 
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kyle2020

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temps and volts seem a bit high. I have a Q6600 G0 with a vid of 1.3125 and it is 100% stable on 1.35v LLC @ 3.2Ghz. I dont break 60*C on 100% load tests. (i always use OCCT as like kyle says, does all for cores and ram and temps/volts in one prog :D)

plus you can set how long it runs for, set cpu priority etc. Im sure running 4 seperate programs for each core will mean the cpu has to work harder than a single program anyway?

Also, try reducing your volts like alex said. I can get 3.6 stable on just 1.35ish volts. Currently running stock @ 1.22V.

:toast:
 
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temps and volts seem a bit high. I have a Q6600 G0 with a vid of 1.3125 and it is 100% stable on 1.35v LLC @ 3.2Ghz. I dont break 60*C on 100% load tests. (i always use OCCT as like kyle says, does all for cores and ram and temps/volts in one prog :D)

There is a huge difference between volts required for 3.2GHz and 3.6GHz though. Pretty sure I could do 3.2GHz on 1.35V.

Between 3.2GHz and 3.6GHz you are on the exponential side of the curve so volts go up fast and so do temps.

At stock FSB and voltage on auto my Q6600 came up at 1.208V. I wrote down my VID but don't have it handy.
 
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plus you can set how long it runs for, set cpu priority etc. Im sure running 4 seperate programs for each core will mean the cpu has to work harder than a single program anyway?

Also, try reducing your volts like alex said. I can get 3.6 stable on just 1.35ish volts. Currently running stock @ 1.22V.

:toast:

Pretty sure this Vcore is as low as I can go with stability for 3.6GHz. Maybe my chip is not as good as yours or there is a possiblity that some of my other BIOS settings require tweaking. Can you have a look at my BIOS voltages and let me know how your other settings compare?
 
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Pretty sure this Vcore is as low as I can go with stability for 3.6GHz. Maybe my chip is not as good as yours or there is a possiblity that some of my other BIOS settings require tweaking. Can you have a look at my BIOS voltages and let me know how your other settings compare?

I was also toying with the idea of lapping the CPU. Wonder how much I could reduce my temps if I did that? I had huge success with an AC7 heatsink by lapping it. About 8C if I remember correctly.
 
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kyle2020

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theres a large possibility that its not as good. its highly dependant on batches with these Q6600's. I was lucky and got one off an above average batch. Some people cant even get past 3.2 on theirs!

Ima go into an old thread and find all my info out, but i have one suggestion so far - try lowering your RAM speed and loosening your timings, it MIGHT let you run at 3.6 stable under less voltage.

(Ill be right back to help, i have to do some housework first :shadedshu)
 
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theres a large possibility that its not as good. its highly dependant on batches with these Q6600's. I was lucky and got one off an above average batch. Some people cant even get past 3.2 on theirs!

Ima go into an old thread and find all my info out, but i have one suggestion so far - try lowering your RAM speed and loosening your timings, it MIGHT let you run at 3.6 stable under less voltage.

(Ill be right back to help, i have to do some housework first :shadedshu)

I'm pretty sure the RAM is OK at these speeds. It is OCZ Gold PC2-8800 so it is rated to run at 1100MHz with 555-15-2T if I remember correctly. I left the memory timings on "auto". I tried once to set it manually to 666-15-2T and it didn't post... weird....
 
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kyle2020

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Ok. Lapping can shave a large chunk of degrees off your cpu's temps, but its quite risky if you dont know what your doing. Id love to try it but i dont want to risk it :ohwell:

Im going to log off, reboot my system and boot into windows @ 3.6 and see how low i can go in terms of voltage, and get back to you. If you can, reboot now and lower your voltage down to just a touch over 1.4?
 
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kyle2020

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Oh and also try setting your multi to 9x and your FSB to 400 for 3.6 - you may have to sacrifice some ram speed but it might help too.
 
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Oh and also try setting your multi to 9x and your FSB to 400 for 3.6 - you may have to sacrifice some ram speed but it might help too.


I did run at 400X9 for a while but I have already established that the motherboard is happy running at 450FSB. I ran my E8400 at 485FSB for months on end at 100% stability. Unless you think that the Q6600 itself can not handle 450?
 
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kyle2020

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I did run at 400X9 for a while but I have already established that the motherboard is happy running at 450FSB. I ran my E8400 at 485FSB for months on end at 100% stability. Unless you think that the Q6600 itself can not handle 450?

that could be the problem. I say could because i havent owned my Q6600 for long, and had a two day binge of overclocking. Since i have ran her at stock.
 

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I did run at 400X9 for a while but I have already established that the motherboard is happy running at 450FSB. I ran my E8400 at 485FSB for months on end at 100% stability. Unless you think that the Q6600 itself can not handle 450?

Its much harder to push the FSB (and CPU speed for that matter) up on quads than duals, for the CPU and Mobo. A lot of quads stop at about 450FSB. I settled for 3.2Ghz via 400*8. It started to get much too complicated to increase further and it gave me no gain in games.
 
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hey im running the exact same settings as you... right now at 450x8 at 1.53V (1.50 with droop)...


65C is right... 3/8 tubing is fine, almost no difference from 1/2 performance wise.
Two suggestions:

1. Mount a passive resevoir.
2. Get a second radiator. You can get one off the egg cheap.

If you have space to do both of these (im using NXZT tempest and have one radiator on the top and one on the back) you can keep your loop quiet and drop temps by 10C. Otherwise 65C is fine, definitely within spec... and you can run it at those temps 24/7.

EDIT: i used to rine my quad at 3.66 (9x407), and 8X450 is just faster... i wouldnt go down to 9x400.
 
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kyle2020

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1.5V? i wouldnt run that 24/7, degradation will hit you hard!
 

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hey im running the exact same settings as you... right now at 450x8 at 1.53V (1.50 with droop)...


65C is right... 3/8 tubing is fine, almost no difference from 1/2 performance wise.
Two suggestions:

1. Mount a passive resevoir.
2. Get a second radiator. You can get one off the egg cheap.

If you have space to do both of these (im using NXZT tempest and have one radiator on the top and one on the back) you can keep your loop quiet and drop temps by 10C. Otherwise 65C is fine, definitely within spec... and you can run it at those temps 24/7.

1.5V? i wouldnt run that 24/7, degradation will hit you hard!

Agree, you shouldnt need that higher volts to get 3.6Ghz. I wouldnt ever go over 1.4v personally and have heard 1.45v is max before degradation.
 
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kyle2020

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Agree, you shouldnt need that higher volts to get 3.6Ghz. I wouldnt ever go over 1.4v personally and have heard 1.45v is max before degradation.

i did one suicide run to hit 4Ghz @ 1.6V - i was idling at 50 odd degrees. About cried haha. never ever ever will run at over 1.4ish volts for 24/7. NEVER.
 
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