You've got plenty of power. I'm running an E6600 OC @3.6GHz, Asus P5B, 2 GB DDR2 1066, Raptory X, Audigy 2ZS and 7800 GTX all that on 480Watts. My PSU only has 32 amps total, when yours has 38 amps. You could run for sure one 8800 GTX and most likely two. "You enough power and then some."