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PCI-E 6/6 vs 6/8 (or 8/6) pin verification

post #1 of 6
Thread Starter 
Before I go and do something silly I wanted to double check something with you guys. Here's the problem, my new Silverstone DA850 comes with the following pci-e modular cables, (with the modular ports on the psu side to support all of them)

PSU SIDE / Device Side
-----------------------------------------
6----------------------6------6
6----------------------6------6
8----------------------8
8----------------------8

then the cable in question...
One side has an 8, the other a 6 (so its a 8--6 or 6--8, both sides labelled "pci express")

I only run one gpu which needs a 6. The only cables I have are the ones above with the extra pass thru connector which is royally messing up my cable management

Looking at the color coding, and the chart in the manual it seems that all the yellows and blacks line up on both the 6---6-6 and the 8-6/6-8 cable. My question is, can I power my gpu by plugging the 8 pin to the psu, and the 6 pin to the gpu? I am assuming the cable is reversable, where it could go...

8-----6
or
6-----8

is this correct?

If so I can fix my CM without cutting up one of the 6---6-6

thanks for your help
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Chuckle2Tits
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post #2 of 6
Thread Starter 
anyone?
Chuckle2Tits
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Chuckle2Tits
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post #3 of 6
Thread Starter 
from what I have been reading it seems the cables are interchangeable and I can run the 8/6 pin cable with 8 at the psu, and 6 to the gpu without any problems. I guess I will just try it later if no one answers by then.
Chuckle2Tits
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Chuckle2Tits
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post #4 of 6
Basically, you want to use a 6-pin PCIe plug in the 8-pin PCIe outlet? That's fine as long as you don't reverse the polarity. Check my pinouts post in my sig.
Once again...
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Once again...
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post #5 of 6
Thread Starter 
yep I checked all the wires on the 8 side vs the 6 and the first 6 in the 8 match the 6 exactly, 3 hot 3 ground and 3 hot 3 ground. Also I emailed silverstone usa tech support and amazingly they got back to me, here is the convo:

I asked:
Quote:
Hello, I have a new Silverstone DA850. I have one question concerning the included PCI-E 8 to PCI-E 6 cable... Can this cable be plugged into the PSU at the 8pin port, to power a single pci-e GPU that accepts a 6pin PCI-E connector? None of the documentation mentions this. I am assuming thats what this cable is for (an optional 8-6 or 6-8 pci-e config) since its marked pci-e on both ends. I am currently using the the dual 6pin cable but the unused connector is annoying asthetically.

Thanks in advance

They replied:
Quote:
Hi,

yes you can connected there the cable is optional for video card that uses both connectors or just either one you can switch the cables around


Thank You


Joel
i think I should be ok.
thanks for the help
Chuckle2Tits
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Chuckle2Tits
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CPUMotherboardGraphicsRAM
Core i7 920 2.66 45nm D0 Foxconn BloodRage x58 EVGA GTX 285 6 GB Corsair Dom. DDR3 1600 
Hard DriveOptical DriveOSMonitor
1x300 GB WD Velociraptor Asus 16/48 DVD/CD ROM SATA Windows 7 Pro 64 bit Viewsonic VX2255wmb 22" LCD 
KeyboardPowerCaseMouse
Logitech USB wired Silverstone Decathalon 850 PolymorphiX (PMX_v1s) ms optical, wired 
Mouse Pad
ancient piece of crap :P 
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post #6 of 6
Thread Starter 
running the 8 to 6 cable, no issues
Chuckle2Tits
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CPUMotherboardGraphicsRAM
Core i7 920 2.66 45nm D0 Foxconn BloodRage x58 EVGA GTX 285 6 GB Corsair Dom. DDR3 1600 
Hard DriveOptical DriveOSMonitor
1x300 GB WD Velociraptor Asus 16/48 DVD/CD ROM SATA Windows 7 Pro 64 bit Viewsonic VX2255wmb 22" LCD 
KeyboardPowerCaseMouse
Logitech USB wired Silverstone Decathalon 850 PolymorphiX (PMX_v1s) ms optical, wired 
Mouse Pad
ancient piece of crap :P 
  hide details  
Reply
Chuckle2Tits
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 920 2.66 45nm D0 Foxconn BloodRage x58 EVGA GTX 285 6 GB Corsair Dom. DDR3 1600 
Hard DriveOptical DriveOSMonitor
1x300 GB WD Velociraptor Asus 16/48 DVD/CD ROM SATA Windows 7 Pro 64 bit Viewsonic VX2255wmb 22" LCD 
KeyboardPowerCaseMouse
Logitech USB wired Silverstone Decathalon 850 PolymorphiX (PMX_v1s) ms optical, wired 
Mouse Pad
ancient piece of crap :P 
  hide details  
Reply
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