Glacial Power 550W PSU
 

Glacialpower was kind enough to send over their 550W power
supply, the GP-PS550BP. With an intelligent and silent design, it should
provide great performance with some peace and quiet. I'll crack open the
PSU to take a look inside as well to see what it's made of. With 550
Watts of power, it can power just about any mid-range PC you can piece
together and possibly more.

http://www.gideontech.com/content/articles/368/1