Wattage Calculator

[bobsaget]

http://www.jscustompcs.com/power_supply/

Is your PSU good enough?

[xonik]

"Wattage" is no good measure of what kind of power supply you need. At least you should know what kind of current draws to expect from each voltage line. Raw power consumption values are too vague.

[Ice Czar]

Id agree that calculator is more of a joke than an aid
takaman's Power Supply Calculator ver 2.00 (2004.04) (http://takaman.jp/D/index.html?english)
to figure your amps and watts ;)