I have a motherboard with two PCIe x16 2.0 graphics slots. Can each of those handle 75 watts? I have two 68 w GPUs, neither has a 6/8 pin power input. If I plug them both in and run them on the same bus, are they going to get 75 w each, or split 75 watts between them? Thanks! Bonus problem: ever heard of someone getting a FirePro W7000 to work in a Precision T3500? If yes, how?