Can I power two GPUs with a single dual 8-pin cable?

[bran_donger]

Exactly as the title says. I have an XFX full-modular PSU and two GTX 960 SSCs. The PCI-e cables on the power supply each have two 8-pin headers.

So can I use a single cable to power both cards, or must I use separate cables?

 

[JasonL265]

If your power supply only has a single cable, then the PSU itself probably isn't meant for SLI and does not supply enough power for two cards. How many watts is your PSU?

I think for GTX 960s SLI you need like 600 Watts, i would go for 750 just to be safe since yours are SSCs.

 

[boosted1g]

You would want at least 650 for SLI on 960s.

Now that is 650w from a quality PSU, not some low-medium end gpu that put 600w on a sticker and called it good.

 

[bran_donger]

If your power supply only has a single cable, then the PSU itself probably isn't meant for SLI and does not supply enough power for two cards. How many watts is your PSU?

I think for GTX 960s SLI you need like 600 Watts, i would go for 750 just to be safe since yours are SSCs.

Ah, that's not what I meant. It's an 850W XFX Pro Black Edition, more than enough to power two 960s. There are plenty of PCI-e cables, but I'm just wondering if I can just use one instead of two, for the sake of cable management.

And by using one, I mean it's fully modular, and a single PCI-e cables has TWO 6+2-pin headers, probably meant to power cards with two power inputs. I want to know if I can use ONE of those to power TWO cards.

 

[Gam3r01]

Since the XFX units support a single +12v rail, there is no reason you cant (same logic as using one vs two cables for a card with two ports)