Using a single Dual 8+8 Pin PCI-E Cable?

JamesU2005 · 25 Mar 2021 at 21:29

I own a Corsair RM650x PSU and am upgrading my old 1070TI for an 6700XT.

The new GPU requires two 8-pin PCI Express Power connectors

The Corsair RM650x includes a PCI Express Power cable with two 8-pins on it (6+2 and 6+2).

Is it OK to use this or should I really be using a 2nd completely separate cable?

rare · 26 Mar 2021 at 01:14

It’s generally recommended to use two cables, but I’ve used plenty of cards in the past with a single cable with 2x 8 pin connectors including a RX 6800.

For a 6700XT I really don’t think you will have anything to worry about, especially given the 650x is a solid PSU.

JamesU2005 · 26 Mar 2021 at 07:20

Thanks rare appreciate the reply.

Cooler running · 28 Mar 2021 at 00:39

Using two cables is one of those Urban legends I think.

It's obvious why it might be better, but I've never actually heard of it ever being a problem in anyone's build.

tres_kun · 28 Mar 2021 at 02:44

Dependins on circumstances
But in your case it will be ok
If you had an RTX3090 it will be diferent

slim01 · 28 Mar 2021 at 16:36

JamesU2005 said:
I own a Corsair RM650x PSU and am upgrading my old 1070TI for an 6700XT.

The new GPU requires two 8-pin PCI Express Power connectors

The Corsair RM650x includes a PCI Express Power cable with two 8-pins on it (6+2 and 6+2).

Is it OK to use this or should I really be using a 2nd completely separate cable?

doesnt the 650x have 2 gpu cable slots? deffo use these. i had all kinds of space invader icons on screen with 2080 when using the daisy chain cable you mention

LePhuronn · 16 Apr 2021 at 10:35

Cooler running said:
Using two cables is one of those Urban legends I think.

It's obvious why it might be better, but I've never actually heard of it ever being a problem in anyone's build.

Vega 64 and some 5700XT builds were plagued with issues because of using a single cable. Quite a few threads on these very forums too.