Never touch any adapter if you don't want to burn your house down!
1 slot in your PSU for 1 slot in your GPU, if you want to make it correct. So you can fire up 4 GPU's. A 5th card if you use the last 9th PCIe and a good (not cheap!) CPU/PCIe cable.
Many ppl will say "Hey, just use 1 cable for 1 GPU. Get any cheap chinese adapter and its fine."... Never do this! These cables were made cheaply and get very hot and if you are unlucky, it can burn.
Edit: Yes, just connect 1 of these double cables (6+2 and 6) into 1 slot in your GPU, forget the 6 Pin.
DON'T split the remaining 6 Pin with an adapter into 8 Pin and connect the second slot of that same GPU!
Hey mate, thanks for reply man.
"Edit: Yes, just connect 1 of these double cables (6+2 and 6) into 1 slot in your GPU, forget the 6 Pin."
The RADEON VII requires 2x 8-pin power. You're saying to connect only 1 of the 6+2 and 6 into 1 slot in the GPU, will the GPU still work, because 2x 8-pin power is required?
"DON'T split the remaining 6 Pin with an adapter into 8 Pin and connect the second slot of that same GPU!"
Ouch! I was going to do that tomorrow when the adapter arrived. Thanks man, I will give it a miss now.
I still have my Corsiar PSU, that has the exact cables that are required for RADEON VII to work, do you think its OK to use corsair cables?
I have those adapters and one did burn. I just buy another psu, they are cheap.