Quote Originally Posted by Shandia View Post
The question is, with 3 gpu slots on this board, do I want 2 or 3 gpus? I'll need to figure that out before I get a power supply.
I run (3) HD5870's on a MSI X79A-GD45 Plus motherboard and an Intel i7 4830K chip. My whole rig is overpowered with an Ultra 1200w PSU but I have put a meter on it and it pulls 665 watts running all out. I could probably get away with running a 750w PSU.

For a breakdown the rig with (1) GPU runs at about 400 watts; the other GPU's are about 130 watts a piece. So there are a few numbers to get you started.