http://www.behardware.com/articles/773-3/components-returns-rates.html Antec 0.84% Seasonic 1.31% CoolerMaster 1.52% Corsair 1.67% Fortron 1.70% Enermax 3.1% Thermaltake 3.45% Hiper 4.47% For 500 to 550W supplies, we get the following clas…