A lot of cards (for example, Gigabyte HD7950) come with a 2xMolex->PCIe6 and a 2xMolex->PCIe8 adapter, in case your PSU doesn't have the proper cabling. In that case, you can string your PSU 4 PCIe8 to each of those video cards, then split up your separate molex arms and run them with the PCIe6 adapters.... 4 cards, 2 molex needed for each to supply a PCIe6.... Most PSUs have 6 or 8 molex connectors.
WHAT WORKS
Motherboard Brand: Gigabyte
Motherboard Model & PCIe Slots: GA-970A-D3; two X16, 3 X1
PSU Brand & Model: Silverstone 1200W SST-ST1200-G Evolution
Number & Model GPUs: 4x Sapphire 7950 21196-00-20G Boost Models
Extender Cables: 2 X16 extenders, 2 1X to 16X adapters, works unpowered or powered
tried to put 5 th card in wont finish booting. NOT the boot problem other Gigabyte boards have. It will boot it just locks up. Tried underclocking cards.
How do you use a PSU Brand & Model: Silverstone 1200W SST-ST1200-G Evolution to power up 4 GPUs? , it only has 4 pcie slots and each of your cards take 2 slots each right?
could anyone answer this? im building a rig with the problem of finding a psu that supports 4 gpus
