400-450W PSU Roundup
 

The type of components used in a computer determines the power requirements for the system. If you want to build an extreme performance, highly overclocked computer then you will need a large (and high-quality) power supply. On the other hand, if you're mostly going to be doing office work, most of the "best" power supplies are complete overkill. In fact, even most higher-end systems rarely require more than 500W of power. So why do we have these 1000W+ PSUs? In a word: profit. Assuming you're not going to be running multiple graphics cards or a significant number of hard drives, one of the power supplies we're looking at today -- or something similar to them -- should be ideal.

http://www.anandtech.com/casecooling...oc.aspx?i=3146

excellent advice in that one paragraph! :)

The truth; can you take it? :)

I have but 500W PSU's? :)

Penryn and the 8800GT definatly bring back the better 500W PSUs sitting in many peoples machines like mine

OCZ 420 Powerstream is doing fine after 4 years.