grndzero, I can throw 3 5870's on that? Sorry I'm total hardware noob, I just get my friend to build everything, but he's not into the bitcoin thing so I have to do the research myself.
Yes, the blue slots on the board are the slot type you want for those video cards. They are evenly spaced so that each video card that take 2 slots each will use the slot of the slot with the white connector.