Im building a gpu rig and am thinking of using two psu's.. one to send power just to the gpus via the 6pin PCIe plugs and the other smaller psu to send power to the motherboard
Im wondering how many watts each needs to be
Assume MSI Z97 Gaming 7 mobo with usual ram, cpu and ssd with 6no. powered USB 1x to 16x risers to 6no. sapphire rx470s
Will the gpus draw as much power as they can through the risers and therefore the mobo if no other cables are plugged directly into them? (6pin pcei)
Will the gpus draw half from each? Mobo and 6pin?
If i am powering the gpus via a second psu do i even need powered risers?
Just trying to work out how many watts each psu needs to be before purchase
Thanks all in advance