8 Pin PCI-E connector

Random Murderer · May 13, 2007, 04:02 AM

NOTE: Scroll to the bottom of this post for the correct diagram.

Ok, to start off, help on this would be greatly appreciated.

I'm trying to get a pin-out of the 8-Pin PCI-E connector for those of us who would rather make one than buy one, or who can't find one to buy (if anyone knows where to buy one, that would be good too).

So far, I have the original 6-pin pin-out thanks to our own W1zzard!
here's my more in-depth version, albeit made in paint...

Here's what I have on 8-pin so far, I don't know what the rails are, but the shape of the pins is a start...

I will keep this post(and the above image) edited as we find out more.

EDIT:
COMPLETED!!!

EDIT:
After further research and ample time of the cards that require these being released, the diagram I made was found to be wrong. I used a picture of a 6 to 8 pin adapter, and that company must have color coded the wires incorrectly. Thanks to KennyT772 we have an up-to-date, CORRECT diagram.

Random Murderer · May 13, 2007, 06:23 AM

Updated!

Wile E · Jun 19, 2007, 06:01 AM

OneCool said he tried running a 12v+ to the other pin, and it didn't work.

Can anybody confirm this?

Random Murderer · Jun 19, 2007, 06:05 AM

Quote:

Originally Posted by Wile E

OneCool said he tried running a 12v+ to the other pin, and it didn't work.

Can anybody confirm this?

he said so about the 2900xt, and we're not even sure if it just his card or not. verificataion would be appreciated.

W1zzard · Jun 19, 2007, 06:34 AM

afaik. to enable overdrive the 2900 xt needs to "see" the 4th ground pin connected, not the +12v one

Wile E · Jun 19, 2007, 06:54 AM

Would there be any benefit to attaching the 12v+, especially with stock cooling?

W1zzard · Jun 19, 2007, 06:59 AM

ati says better overclocking. i seriously doubt it, but if you want to use ccc overclocking you must have the 4th ground connected for the overdrive tab to be visible

OneCool · Jul 3, 2007, 12:20 AM

Quote:

Originally Posted by W1zzard

afaik. to enable overdrive the 2900 xt needs to "see" the 4th ground pin connected, not the +12v one

Yeah that's all.

As far as the extra 12v line I seen know deference in OCing at all

KennyT772 · Jul 28, 2007, 12:43 AM

.

The correct diagram made in paint. Correct pinouts and socket, the current diagram at the top of the page is incorrect in both.

hat · Jul 28, 2007, 12:45 AM

I want to use molex

DeathVark · Aug 1, 2007, 04:42 AM

found adapter: converts 6-pin to 8-pin.
$9.99 but shipping to me is like another $8

Anybody seen cheaper?
http://www.frozencpu.com/products/60...g11c28#options

Wile E · Aug 1, 2007, 08:45 AM

HAHAHAHAHA!!! BOTH extra pins are ground. Talk about a marketing scam. lol

Sasqui · Oct 3, 2007, 08:19 PM

Quote:

Originally Posted by DeathVark

found adapter: converts 6-pin to 8-pin.
$9.99 but shipping to me is like another $8

Anybody seen cheaper?
http://www.frozencpu.com/products/60...g11c28#options

I looked and can't find anything cheaper myself - just ordered one. I'd prefer to see one with an additional 4-pin Molex draw, but two dedicated 6-pin pci-e connectors should do it... My system (X1950XTX) now draws 320 Watts under load (measured with Kill-A-Watt). And thats with a single 6-pin connector.

DanTheBanjoman · Oct 3, 2007, 08:50 PM

Quote:

Originally Posted by Wile E

HAHAHAHAHA!!! BOTH extra pins are ground. Talk about a marketing scam. lol

Talk about not understanding electronics. Obviously the current on those pins can be pretty high, therefor the extra ground.

Tatty_One · Oct 3, 2007, 09:05 PM

Excuse my ignorance not having a 2900 card, but for those who have not got the 8 pin PCI-E....what proggie are you using to overclock?

DonInKansas · Oct 3, 2007, 09:07 PM

Find em on Ebay. Way cheaper.

KennyT772 · Oct 3, 2007, 09:15 PM

Atitool, ati clock set, tray tools, i think rivatuner works too.

Sasqui · Oct 3, 2007, 11:55 PM

Quote:

Originally Posted by DanTheBanjoman

Talk about not understanding electronics. Obviously the current on those pins can be pretty high, therefor the extra ground.

Who knows... I *wish* someone would test that, I don't have the equipment. The ATX std wire guage may or may not support it - the question is what amps the pins draw - for sure.

Sasqui · Oct 3, 2007, 11:56 PM

Quote:

Originally Posted by DonInKansas

Find em on Ebay. Way cheaper.

Have you seen them.

KennyT772 · Oct 4, 2007, 01:24 AM

In order for a PSU to be pci-e 2.0 certified the 8pin power cables have to be higher gauge wire, enough so they can handle like 4amp per wire. That is easy for even 22ga wire but some cheaper units cannot output this kind of amperage over each wire. 12.5amp over 3 wires is quite a bit a juice so instead of just requiring higher gauge all around, they added 2 extra grounds making it only 2.5amp per ground. This allows smaller gauge ground wire to be used saving cost and sets an easy way to check if the power supply is pci-e 2.0 compliant.

Sasqui · Oct 4, 2007, 01:35 AM

Quote:

Originally Posted by KennyT772

In order for a PSU to be pci-e 2.0 certified the 8pin power cables have to be higher gauge wire, enough so they can handle like 4amp per wire. That is easy for even 22ga wire but some cheaper units cannot output this kind of amperage over each wire. 12.5amp over 3 wires is quite a bit a juice so instead of just requiring higher gauge all around, they added 2 extra grounds making it only 2.5amp per ground. This allows smaller gauge ground wire to be used saving cost and sets an easy way to check if the power supply is pci-e 2.0 compliant.

Thx Kenny - did you write that or is it a quote?

Wile E · Oct 4, 2007, 05:36 AM

Quote:

Originally Posted by DanTheBanjoman

Talk about not understanding electronics. Obviously the current on those pins can be pretty high, therefor the extra ground.

Well, where is the benefit to these extra grounds, when they are just jumped off of the other grounds, as per the photo of the adapter? And, considering that I haven't heard of anyone melting their 6pin connectors, I seriously doubt there is any real benefit to the 8pin, unless, of course, your psu manufacturer cheaped out on the wire gauges. If that's the case, you probably should've bought a better psu to begin with. My understanding of electronics is what lead me to deduce that this is a scam.

Oct 7, 2007, 07:48 PM

wait now, I just thought of a fun thought. If the extra ground is to help with the "high current" coming off of the pins, doesn't that mean that the yellow wires would melt before the black ones? unless the 2900 has a generator in it, or there is a shortage of ground-pins, What's the point?

newtekie1 · Oct 7, 2007, 07:53 PM

Quote:

Originally Posted by Random Murderer

This can't be right, can it? You can put a 6-pin plug into an 8-pin socket, so if this was right the 12vDC on the 6-pin would be going into the ground of the 8-pin.

Wile E · Oct 7, 2007, 07:55 PM

Quote:

Originally Posted by newtekie1

This can't be right, can it? You can put a 6-pin plug into an 8-pin socket, so if this was right the 12vDC on the 6-pin would be going into the ground of the 8-pin.

Nope, post #9 has the correct diagram.

May 13, 2007, 04:02 AM	#1
Random Murderer Join Date: Dec 2006 Location: Florida, where it's hot as hell. Posts: 3,331 (2.50/day) Thanks: 431 Thanked 375 Times in 294 Posts System Specs	8 Pin PCI-E connector NOTE: Scroll to the bottom of this post for the correct diagram. Ok, to start off, help on this would be greatly appreciated. I'm trying to get a pin-out of the 8-Pin PCI-E connector for those of us who would rather make one than buy one, or who can't find one to buy (if anyone knows where to buy one, that would be good too). So far, I have the original 6-pin pin-out thanks to our own W1zzard! here's my more in-depth version, albeit made in paint... Here's what I have on 8-pin so far, I don't know what the rails are, but the shape of the pins is a start... I will keep this post(and the above image) edited as we find out more. EDIT: COMPLETED!!! EDIT: After further research and ample time of the cards that require these being released, the diagram I made was found to be wrong. I used a picture of a 6 to 8 pin adapter, and that company must have color coded the wires incorrectly. Thanks to KennyT772 we have an up-to-date, CORRECT diagram. __________________ Rig 1 & 2: See system specs. Rig 3: ASRock 775Dual-VSTA, Pentium D 820 @ 3.4GHz, 2GB G.Skill 2GBNQ, ATi x1950PRO 256MB, Apevia Chameleon 550W PSU, Modded P1 case. Learn how to mod your HD3870! Click here! "There were hard times ahead for the people of planet Pendulum. Staring into the networks of space and time, their eyes were open, but still they were blind." Last edited by Random Murderer; Oct 8, 2007 at 11:55 AM.

System Name:	Divided by Zer0 \| Fatal Error
Processor:	Core2 Quad Q6600 B3 \| Core2 Duo E8400 E0
Motherboard:	DFI LanParty UT X48-T3RS \| EVGA 790i Ultra SLI
Cooling:	Xigmatek HDT-S1283, Xigmatek Dragoon N422 \| Stock
Memory:	4x 2GB Crucial Value D9JNM DDR3-1066 \| 2x 1GB Patiot Viper DDR3-2000
Video Card:	Crossfire HIS HD4870 512MB, EVGA GTS250 for Physx \| Zotac 9800GTX+
Hard Disk:	Too many, lol.
CRT/LCD Model:	22" Acer P221wBx 16:10 1680x1050 \| HP w2207h 16:9 1920x1080
Case:	Lian-Li PC-A05B \| Chenming 601ae-BLU
Sound Card:	RM-DAC -> Xiang Sheng 708b -> Sennheiser HD650
PSU:	Sparkle(Fortron) MAGNA 1000W \| Enermax Liberty 620W
Software:	Win 7 64

May 13, 2007, 06:23 AM	#2
Random Murderer Join Date: Dec 2006 Location: Florida, where it's hot as hell. Posts: 3,331 (2.50/day) Thanks: 431 Thanked 375 Times in 294 Posts System Specs	Updated! __________________ Rig 1 & 2: See system specs. Rig 3: ASRock 775Dual-VSTA, Pentium D 820 @ 3.4GHz, 2GB G.Skill 2GBNQ, ATi x1950PRO 256MB, Apevia Chameleon 550W PSU, Modded P1 case. Learn how to mod your HD3870! Click here! "There were hard times ahead for the people of planet Pendulum. Staring into the networks of space and time, their eyes were open, but still they were blind."

System Name:	Divided by Zer0 \| Fatal Error
Processor:	Core2 Quad Q6600 B3 \| Core2 Duo E8400 E0
Motherboard:	DFI LanParty UT X48-T3RS \| EVGA 790i Ultra SLI
Cooling:	Xigmatek HDT-S1283, Xigmatek Dragoon N422 \| Stock
Memory:	4x 2GB Crucial Value D9JNM DDR3-1066 \| 2x 1GB Patiot Viper DDR3-2000
Video Card:	Crossfire HIS HD4870 512MB, EVGA GTS250 for Physx \| Zotac 9800GTX+
Hard Disk:	Too many, lol.
CRT/LCD Model:	22" Acer P221wBx 16:10 1680x1050 \| HP w2207h 16:9 1920x1080
Case:	Lian-Li PC-A05B \| Chenming 601ae-BLU
Sound Card:	RM-DAC -> Xiang Sheng 708b -> Sennheiser HD650
PSU:	Sparkle(Fortron) MAGNA 1000W \| Enermax Liberty 620W
Software:	Win 7 64

Jun 19, 2007, 06:01 AM	#3
Wile E Power User Join Date: Oct 2006 Location: Western PA (Pittsburgh suburbs) Posts: 15,840 (11.32/day) Thanks: 341 Thanked 3,004 Times in 2,555 Posts System Specs	OneCool said he tried running a 12v+ to the other pin, and it didn't work. Can anybody confirm this? __________________ Visit Ashentech “What the hell did you expect? Leave Vista under the pillow and the OS fairy would make it Win7?” -El Fiendo “And Bring Mailman back god damnit, he is the Eric Cartman of TPU” -MRCL

System Name:	The ClusterF**k
Processor:	980X @ 4212Mhz 24/7
Motherboard:	Gigabyte GA-EX58-UD5 BIOS F12
Cooling:	2x360mm rad, 2xDDC-1 pump w/Bitspower res top (1/2" fittings), Koolance CPU-360, DD-4870-X2
Memory:	3x2GB Mushkin Redlines 1600Mhz 6-8-6-24
Video Card:	4870X2
Hard Disk:	Seagate 7200.10 320GB x2 RAID0; 2 x Samsung F2 1.5TB no raid; 2 x Samsung F1 1TB
Optical Drive:	LG WH10LS30K 10X Blu-ray Burner
CRT/LCD Model:	HP LP2475w 24" 1920x1200 IPS
Case:	Technofront Bench Station
Sound Card:	Auzentech X-Fi Forte
PSU:	ENERMAX Galaxy EVO EGX1250EWT 1250W
Software:	Win7 Ultimate N x64

Jun 19, 2007, 06:34 AM	#5
W1zzard Administrator Join Date: May 2004 Location: Stuttgart, Germany Posts: 9,209 (4.06/day) Thanks: 97 Thanked 4,080 Times in 1,355 Posts System Specs	afaik. to enable overdrive the 2900 xt needs to "see" the 4th ground pin connected, not the +12v one

Processor:	Intel Core 2 Duo E8400 @ 3.3 GHz
Motherboard:	ABIT AW9D-MAX
Cooling:	Scythe Infinity
Memory:	2x 2048MB Mushkin PC2-8800
Video Card:	PowerColor HD 5870 PCS+ 1 GB
Hard Disk:	74 GB WD Raptor, 250 GB WD Caviar SE, 500 GB WD Caviar
Optical Drive:	BenQ DW1640
CRT/LCD Model:	Dell 2001FP 20.1" TFT, 1600x1200 + 19" 1280x1024
Case:	Thermaltake Eureka
Sound Card:	On-board Realtek HD
PSU:	Zalman ZM-850 HP
Software:	Windows 7 32-bit

Jun 19, 2007, 06:54 AM	#6
Wile E Power User Join Date: Oct 2006 Location: Western PA (Pittsburgh suburbs) Posts: 15,840 (11.32/day) Thanks: 341 Thanked 3,004 Times in 2,555 Posts System Specs	Would there be any benefit to attaching the 12v+, especially with stock cooling? __________________ Visit Ashentech “What the hell did you expect? Leave Vista under the pillow and the OS fairy would make it Win7?” -El Fiendo “And Bring Mailman back god damnit, he is the Eric Cartman of TPU” -MRCL

Jun 19, 2007, 06:59 AM	#7
W1zzard Administrator Join Date: May 2004 Location: Stuttgart, Germany Posts: 9,209 (4.06/day) Thanks: 97 Thanked 4,080 Times in 1,355 Posts System Specs	ati says better overclocking. i seriously doubt it, but if you want to use ccc overclocking you must have the 4th ground connected for the overdrive tab to be visible

Jul 28, 2007, 12:43 AM	#9
KennyT772 Join Date: Dec 2005 Location: Houghton, Mi - Michigan Tech Posts: 2,930 (1.74/day) Thanks: 19 Thanked 101 Times in 96 Posts System Specs	. The correct diagram made in paint. Correct pinouts and socket, the current diagram at the top of the page is incorrect in both. __________________ Xfire Heatware Last edited by KennyT772; Aug 2, 2007 at 04:30 PM.

System Name:	Raptor
Processor:	Intel E8400 Wolfdale @3600
Motherboard:	Asus P5Q-Pro LGA775
Cooling:	Zalman CNPS9700
Memory:	1024mbx2 Crucial Ballistix DDR800
Video Card:	XFX 9600GT
Hard Disk:	Seagate 7200.11 500GB
Optical Drive:	Samsung DVD-RW
CRT/LCD Model:	Acer AL2216Wbd and Acer AL1717
Case:	Gigabyte 3DAurora Black
Sound Card:	Creative X-Fi Extreme Gamer Faitality
PSU:	OCZ GameXStream 500w

Jul 28, 2007, 12:45 AM	#10
hat Maximum Overclocker Join Date: Nov 2006 Location: Ohio Posts: 10,101 (7.49/day) Thanks: 1,626 Thanked 1,339 Times in 1,105 Posts System Specs	I want to use molex __________________ TDP = Stock TDP(MHz / Stock MHz)(voltage / stock voltage)^2 My Heatware “my computer is too slow to run DOS 6.22” -PVTCaboose1337

System Name:	AthlonII2800 // Celeron1800
Processor:	Athlon II x2 240 (lapped) // Celeron 430 (lapped)
Motherboard:	Biostar TF720 A2+ // ECS P4M900T-M
Cooling:	CPU: AC Freezer 64 (lapped), GPU: Stock, heatspreaders on RAM // CPU: Stock, GPU: Zalman VF900
Memory:	2x2GB Geil Black Dragon DDR2-800 // 1x2GB DDR2-667
Video Card:	G92 8800GTS 512MB // 9600GSO 384MB (192-bit)
Hard Disk:	WD Velociraptor 150GB, WD Caviar Green 2TB // WD 250GB IDE
Optical Drive:	SATA DVD-ROM + SATA DVD-RW // IDE CD-ROM
CRT/LCD Model:	19" HDTV w/ HDMI hookup // None
Case:	Antec 1030B // Generic White Mid-Tower
Sound Card:	Onboard // Onboard
PSU:	Antec NeoHE 550W // POWMAX 400w
Software:	Windows 7 Home Premium x64 // Windows XP Pro x64

Aug 1, 2007, 04:42 AM	#11
DeathVark Join Date: Jul 2007 Posts: 37 (0.03/day) Thanks: 5 Thanked 3 Times in 3 Posts System Specs	found adapter: converts 6-pin to 8-pin. $9.99 but shipping to me is like another $8 Anybody seen cheaper? http://www.frozencpu.com/products/60...g11c28#options

Processor:	AMD Athlon 64 X2 4800+ Brisbane@2.875GHz
Motherboard:	ASUS M2R32-MVP
Cooling:	ZALMAN 9700 LED
Memory:	OCZ Platinum Revision-2 2GB (2 x 1GB)
Video Card:	VisionTech HD 2900XT 512Mb
Hard Disk:	WD 320GB
Optical Drive:	BenQ 1640PRO
CRT/LCD Model:	Dell 2005FPW
Case:	Thermaltake Tsunami Dream
PSU:	OCZ GameXtream 700W
Software:	Win XP Home SP2

Aug 1, 2007, 08:45 AM	#12
Wile E Power User Join Date: Oct 2006 Location: Western PA (Pittsburgh suburbs) Posts: 15,840 (11.32/day) Thanks: 341 Thanked 3,004 Times in 2,555 Posts System Specs	HAHAHAHAHA!!! BOTH extra pins are ground. Talk about a marketing scam. lol __________________ Visit Ashentech “What the hell did you expect? Leave Vista under the pillow and the OS fairy would make it Win7?” -El Fiendo “And Bring Mailman back god damnit, he is the Eric Cartman of TPU” -MRCL

Processor:	Core2 E8600 4.2 Ghz 24/7
Motherboard:	ASUS Maximus Formula X38
Cooling:	SWTech 320 Rad, Modded 655 Pump, Koolance 345
Memory:	4GB G.Skill DDR2-1066 5-5-5-15
Video Card:	XFX HD 5870 XXX Edition 1000/1300
Hard Disk:	WD 320 / 500KS / 500KS / 640KS / 640LS / 640LS / 640LS
Optical Drive:	NEC 2540
CRT/LCD Model:	24" DELL 2405FPW
Case:	Modded HAF 932
Sound Card:	ASUS SupremeFX II
PSU:	Corsair HX750 (love it)
Software:	WinXP Pro SP3
Benchmarks:	Stable @ 4.7 Ghz 1.32v 3DMark06 = 22.6K

Processor:	Dual Xeon 5506
Motherboard:	Asus Z8NA-D6
Cooling:	2x Thermalright HR-01 X/passive
Memory:	6GB Corsair something
Video Card:	EVGA GTX 260 Core 216
Hard Disk:	None
Optical Drive:	None
CRT/LCD Model:	24" Asus
Case:	Thermaltake Swing
Sound Card:	Onboard
PSU:	620W CM
Software:	Win2k8

Oct 3, 2007, 09:05 PM	#15
Tatty_One Moderator™ Join Date: Jan 2006 Location: Worcestershire UK Posts: 9,795 (5.92/day) Thanks: 706 Thanked 1,129 Times in 939 Posts System Specs	Excuse my ignorance not having a 2900 card, but for those who have not got the 8 pin PCI-E....what proggie are you using to overclock? __________________

Processor:	Core i7 920 C0 @ 4.2Gig 1.3v
Motherboard:	Gigabyte EX58 UD4P
Cooling:	TRUE120\dual Scythe Sflex's
Memory:	6GB Kingston HyperX 1600mhz kit
Video Card:	Asus HD5850 DirectCU@1035mhz
Hard Disk:	2xSammySpinpoint 320GB Raid 0
Optical Drive:	LG BluRay/HD + LG SuperMulti
CRT/LCD Model:	HannsG 28" Widescreen on HDMi
Case:	Coolermaster HAF RC932
Sound Card:	Xifi Elite Pro/VideoLogicZXR550's
PSU:	Thermaltake ToughPower 750W
Software:	Win 7 x64, Vista 32 dual boot
Benchmarks:	3D Mark 2006 - 25,370

Oct 3, 2007, 09:07 PM	#16
DonInKansas Join Date: Jun 2007 Location: Kansas Posts: 3,460 (3.00/day) Thanks: 486 Thanked 913 Times in 749 Posts System Specs	Find em on Ebay. Way cheaper.

Processor:	Core i5 750
Motherboard:	Gigabyte p55-ud3r
Cooling:	Xigmatek Thor's Hammer
Memory:	Gskill Pi Black 1600mhz ddr3 2x2GB
Video Card:	Sapphire 5850
Hard Disk:	WD 640gb AALS
Optical Drive:	LiteOn 20x DVDW LS SATA
CRT/LCD Model:	Soyo Topaz S 24" IPS 1920x1200
Case:	Lancool Dragonlord PC-K62
Sound Card:	Onboard
PSU:	Corsair HX620W
Software:	Windows 7 Pro x64

Oct 3, 2007, 09:15 PM	#17
KennyT772 Join Date: Dec 2005 Location: Houghton, Mi - Michigan Tech Posts: 2,930 (1.74/day) Thanks: 19 Thanked 101 Times in 96 Posts System Specs	Atitool, ati clock set, tray tools, i think rivatuner works too. __________________ Xfire Heatware

Oct 4, 2007, 01:24 AM	#20
KennyT772 Join Date: Dec 2005 Location: Houghton, Mi - Michigan Tech Posts: 2,930 (1.74/day) Thanks: 19 Thanked 101 Times in 96 Posts System Specs	In order for a PSU to be pci-e 2.0 certified the 8pin power cables have to be higher gauge wire, enough so they can handle like 4amp per wire. That is easy for even 22ga wire but some cheaper units cannot output this kind of amperage over each wire. 12.5amp over 3 wires is quite a bit a juice so instead of just requiring higher gauge all around, they added 2 extra grounds making it only 2.5amp per ground. This allows smaller gauge ground wire to be used saving cost and sets an easy way to check if the power supply is pci-e 2.0 compliant. __________________ Xfire Heatware

Oct 7, 2007, 07:48 PM	#23
bassmasta Guest Posts: n/a (0/day)	wait now, I just thought of a fun thought. If the extra ground is to help with the "high current" coming off of the pins, doesn't that mean that the yellow wires would melt before the black ones? unless the 2900 has a generator in it, or there is a shortage of ground-pins, What's the point?

Processor:	Intel Core i7 875K@3.6GHz(Too hot for 4.0GHz in the summer :( )
Motherboard:	eVGA P55 FTW 200
Cooling:	Thermalright Ultra-120 Extreme w/ 120mm Antec Tri-Cool Fan
Memory:	8GB Corsair DDR3-1600 7-7-7-20
Video Card:	eVGA GTX470@815/1630/1800
Hard Disk:	1TB Seagate 7200.12(OS), 3x 1.5TB Seagate 7200.11 in RAID 5
Optical Drive:	Lite-On Blu-Ray Combo Drive IHES108
CRT/LCD Model:	HP 25" 2509m 1080p LCD
Case:	Lian-Li Lancool Metal Boned K7 w/ Windowed Side Panel
Sound Card:	Onboard is good enough for me
PSU:	Corsair HX850
Software:	Windows 7 x64 Professional

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)