CX850M PSU - Correct cables for powering 2x PCIe slots for GPU?

[joeltine]

Hi!

I have the Corsair CX850M PSU. On the back there are two eight pin slots labeled "6+2 PCie & 4+4 CPU". I'm trying to connect an AMD 6800 XT GPU (this one) which requires 2x 8 pin connections.

The pig-tailed 8 pin PCIe cable that came with the PSU does not seem to fully power the GPU when both are plugged in (black screen, only one power LED on the GPU). I'm thinking I need to run a separate cable from the remaining open 8 pin slot on the PSU to the GPU to fully power it.

My question is, will any type 3 or 4 PCIe cable work even though the slot is labeled "4+4"? I bought this one from Amazon, which says it's Corsair CX-M compatible, but it didn't work. I'm now looking at this one on the Corsair website.  Will that work? Bit confused here... any ideas?

 

Thanks!

 

 

Edited September 16, 2022 by joeltine

[Corsair Elito]

Hi 

We do not support 3rd party cables, the one from amazon would not work and likely damage your port. 

CP-8920111 will support this PSU, Type 3 & 4 are backwards compatible.