Sign in with
Sign up | Sign in
Your question
Solved

What is the best way to plug an 8-pin GPU into a 6-pin PSU?

Last response: in Graphics & Displays
Share
February 25, 2014 11:05:25 AM

So I just ordered a GTX 770, and though I have been told my power supply is plenty good enough to power this card, I am concerned with how to plug it in correctly, as this card utilizes one 6-pin connector, and one 8-pin, whereas my PSU does not have an 8-pin female port, it has two 6-pin ports.

Now my PSU came with a couple of 6+2-pin cables that have two ends that start with 6+2 male, then they combine into one single 6-pin, which is how I currently have my HD 6870 plugged in, two 6-pins combined into one 6-pin male at the end. I was told I could simply plug the 6+2 end of the adaptor cable into the GPU, and plug the 6-pin end into the PSU, then reserve the other 6-pin port in the PSU for the 6-pin connector on the 770, but I just fail to see how that's logical, as 6-pin outputs 75w, while 8-pin outputs 150w, heck I still don't know how my current 6870 is getting enough power for both its 6-pin ports from one single 6-pin on the psu.

Maybe I'm just a noob and I'm thinking about this too much, but I just felt I needed to ask here, would it work to simply use a 6-pin to 6+2-pin cable to power the 8-pin on the gpu, or is there a better way?

Here is the GPU I ordered:
http://www.amazon.com/EVGA-GeForce-SuperClocked-Graphic...

And here are my system specifications, PSU included as well with exact model.

System:
CPU: i5 2500k, 3.3ghz
RAM: 8gb DDR3, 2 RAM cards
HDD: Seagate 500gb 5400rpm (OS host)
HDD: WD 2tb 7200rpm (Game installs)
Current GPU: XFX Radeon HD6870, Dual Fan Edition, 1gb GDDR5
PSU: CMPSU-650HX
Mobo: Maximus Gene-Z IV Z68

Replies appreciated. :) 

More about : plug pin gpu pin psu

February 25, 2014 11:15:45 AM

You'll just need to connect 1 6pin and one 6+2 pin connector, it's really ease!
m
0
l

Best solution

February 25, 2014 11:23:18 AM

if its the same PSU im looking at online the PCI-E connectors are blue that plug into the powersupply. Plug the blue end into the powersupply and then one 6+2 pin into the 8pin on the video card and the other 6+2 into the 6pin. the extra 2 pins that are not used will just hang there. they are just ground pins so don't worry to much about them.
Share
February 25, 2014 11:41:07 AM

faalin said:
if its the same PSU im looking at online the PCI-E connectors are blue that plug into the powersupply. Plug the blue end into the powersupply and then one 6+2 pin into the 8pin on the video card and the other 6+2 into the 6pin. the extra 2 pins that are not used will just hang there. they are just ground pins so don't worry to much about them.


Well mine isn't colored, it's just an all black cable, but yeah, essentially it has two ends that are both 6+2, and then both ends come together and combine into one 6-pin, which is exactly how my 6870 is currently powered, both 6-pins on the cable from my 6870 combine into one 6-pin that goes into the psu, and my friend who built the PC said to just use that to power both connectors. I suppose I just fail to see the logic in how that works. Trying to power a 250w GPU on both its 8-pin and 6-pin connector through one single 6-pin just seems like a danger waiting to happen to me, seeing as I've read online that 6-pin maxes out at 75w.
m
0
l
!