Cougar PowerX 550 W @ techPowerUp
 

Today, we test our first Cougar PSU, the PowerX-550 that belongs to the mainstream category. It addresses the budget-oriented user looking for a reliable PSU that will get the job done. This unit doesn't include many bells and whistles, but promises a high price/performance ratio.

http://www.techpowerup.com/reviews/Cougar/PowerX_550W/