Seasonic S12II-380 Power Supply
 

Seasonic has been making quiet, efficient, high performance, power supplies for many years. The S12II series is their latest mainstream line. We test drive the 380W model on our torture track. It gets the checkered flag without a single glitch.

http://www.silentpcreview.com/article753-page1.html

Nobody in the industry could beat the way silentpcreview sound reading of sub 25 dBA reports time after time. I have repeated this time after time.

http://www.tomshardware.com/2007/09/..._as_quiete r/