How Much Power Can a Generic 500 W Power Supply Really Deliver?

@ 2008/03/16
We decided to take a generic 500 W power supply and test it using the same methodology we use for "branded" units. The idea behind this review is to be as much educational as possible and answer a few very important questions: how much power a generic power supply can really deliver? What are the differences between a generic power supply and a "branded" unit? Is there any danger for my equipment to use a generic power supply? Why generic units cost so little? Read on and see our findings.

Comment from jakebot @ 2008/03/18
amd 6400 + asus striker mobo + evga 320mb 8800gts +
4 gigs of corsair + 500watt NZXT PSU = fried

yup.... i told him watch out for that psu it's the only
thing that can ruin every other piece of harware.
Comment from jmke @ 2008/03/16
Quote:
Our generic 500 W power supply died when we tried pulling 275 W from it, so the maximum amount of power we could extract was 250 W – half the labeled amount!
omg