My system currently has a 420-Watt power supply and it is powering a Pentium 550, Intel 925x mobo, x850xt video card, a sound card, 3 hard drives, dvd drive, dvd writer drive, 2 120mm fans, 2 80mm fans, a swiftech pump, and some lights.
I just recently upgraded my 19" LCD to a 23" LCD and it...