OCZ PowerStream 520W Power Supply w/Adjustable Rails Video Review
 

"The OCZ PowerStream 520W Power Supply sets itself apart from others because the +3.3V, +5V, and +12V rails can be easily adjusted. This gives it a clear power advantage over others, resulting in total stability. In addition, 2 very quiet fans make it stealth quiet, and it has the best warranty of any PSU on the market. Need worry-free power? Watch the Video to find out more..." ~3dGameMan.com

http://www.3dgameman.com/vr/ocz/520w...eo_review.html

it had problems at default keeping my fx@3ghz close to 12v, it went down to 11.55. after a little adaptation, it stood at 12.00