Sell me on one. Looking at the 550 650 and 750, since my Earthwatts 430s got more load on it then it likes, and its starting to whine when I put a load on the cpu + gpu at the same time. System is a X3 [email protected], 8800GT, 2gb ram on a crappy ecs mobo thats getting replaced when 790GX/SB750 actually shows up.