How Much Watt PSU do I need?

[SineSurfer]

The rule "every 10 degrees hotter a capacitor is, its life time is cut in half." Electrolytic caps folow that rule exactly, for polymer graphs the relationship is less linear. For both caps every ten degrees its lifetime is severly reduced.

Heres an article:
http://www.gigabyte.com.tw/FileList/NewTech/2006_motherboard_newtech/article_02_all_solid.htm