im planning to buy 2 GTX 760's currently i only have 1, my PSU has 2x8-pin connectors on each rail. i just want to know if i can run 2 Asus 760 Of the same cable, they only use 1x8-pin the PSU is an CollerMaster GX750w it says: single 12v rail for up to 60A IDRK what that means.