ohh sorry for da lack of info
amd phenom II x2 545 3.0 callisto
1 X 320gb hdd segate
2 X 2gb knigston 800mhz ram
nvidia xfx 8500 GT 256(planning 2 upgrade to hd 4650 cross fire later on)
22" aoc lcd
2 X 120mm fan 1 wid led ( coolermaster)
case cooler master elite 310
2 X blue cclf + sound module ( to be added today)
ocz xtc ram cooler + ocz vanquisher.(AMD) [to be added later this month]
The general rule of thumb is a high quality 500 to 550 watt power supply with sufficient current (amps) on the 12 volt rail(s) can easily power a system with any single video card made. A high quality 700 to 750 watt power supply with sufficient current (amps) on the 12 volt rail(s) can power a system with two video cards operating in dual mode. There are a few exceptions like the new ATI Radeon HD 5XXX series cards which use less power due to their energy efficiency.
Corsair, PC Power & Cooling, and Seasonic are some of the brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Lately we've been seeing a few other brands offering some high quality units.