Modular PSU to GPU Question [6+2&6]

Santiago Luis · Mar 24, 2015

I have a modular PSU and one of the PCI-e cables, has a 8[6+2] pin and then a 6 pin coming right off of the 8[6+2].

Now my GPU requires 2 6pins to power it, would I be able to power the gpu with just that 1 cable, or do I need two of those cables

Another side question if it is permitted... My PSU manual has different specifications on the PCI-e power cables I have several that are 12v but some are 12v5, while some are 12v4 or 12v3. Do these numbers matter?

The GPU in question is a gtx 980 sc acx 2.0

ThatVietGuy · Mar 24, 2015

For the first question you'll need both cables plugged in otherwise the GPU WILL NOT power up.

DarkSable · Mar 24, 2015

Santiago Luis :

The first guy didn't quite get your situation, and I misunderstood you at first, too. Plug both connectors from that one cable into your graphics card, and you'll be just fine.

I'm presuming that's saying 12 volts at 5 amps, 4 amps, and 3 amps, but I have absolutely no idea why that's an option. Or why your power supply manual has so many options. Use what you've got, and if given a choice, use the 12 volt, 5 amp cable.

Bezzell · Mar 24, 2015

The 8 pin (6+2) cable you're mentioning can be used as either a 6pin or an 8 pin. And yes, you can use both ends of that one cable to populate the two 6 pins on your GPU. Perfectly normal.

Refer to your psu manual or online documentation to identify the correct cable you need for gpu.

JKatwyopc · Mar 24, 2015

What is the manufacturer and model number of the PSU? As to the first question, yes, you absolutely must plug in power to both of the 6 pin connectors on the GPU(just don't use the +2 part of the 6+2 cable). The second question requires more information in order to answer it. It sounds to me as if the PSU you are using has multiple 12v rails and that is why the cables are labelled 12v3, 12v4, 12v5, etc. However we need to know exactly which PSU you have in order to tell you for sure.

Santiago Luis · Mar 24, 2015

Okay so I think I got my answer from DarkSable but just to be sure...

My PSU model is the Silverstone ST1200

And for the first question this is what the cable looks like, and it's one cable that has the 6+2 pin connector and a second 6 pin coming out from the 6+2 pin.

This picture should clear up any confusion:

http://images.bit-tech.net/content_images/2008/09/akasa-powermax-1000w-gaming-psu/pcie-8.jpg

Santiago Luis · Mar 24, 2015

If I am reading your [DarkSable and Bezell] responses correctly I can use this one cable to power both 6 pin slots on my GPU (one with the 6pin portion of the 6+2, and the other with the 6 pin coming out of the 6+2)?

DarkSable · Mar 25, 2015

That's absolutely correct. That single cable will power your graphics card just fine.

Santiago Luis · Mar 25, 2015

Let's say for arguments sake I were to SLI, would I be fine using just two of those cables to power two graphics cards?

Thank you all very much you guys have been very helpful!

Bezzell · Mar 25, 2015

Yes, that's how it works.

DarkSable · Mar 25, 2015

Santiago Luis :

Yep, that you would.

Santiago Luis · Mar 25, 2015

Thank you both very much, you have been very helpful

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Modular PSU to GPU Question [6+2&6]

Santiago Luis

Reputable

DarkSable

ThatVietGuy

Titan

DarkSable

Judicious

Bezzell

Honorable

JKatwyopc

Distinguished

Santiago Luis

Reputable

Santiago Luis

Reputable

DarkSable

Judicious

Santiago Luis

Reputable

Bezzell

Honorable

DarkSable

Judicious

Santiago Luis

Reputable

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