Antec TruePower 550
 

This Is a TRUE 550 Watt PSU; It does not have a peak voltage of 550 Watts
and a normal running voltage of 400 Watts, like some cheaper PSU’s. Instead it has a
much closer voltage of 530 Watts maximum average and a peak of 550 Watts

http://www.worldoverclockers.com/Rev...pageone&id=106