An ultra quiet fan 120mm provides up to 40a 480w on the 12v rail active power factor correction pfc complete protections ocp ovp uvp opp scp otp provides up to 500w at 40 intel haswell compatible outstanding 3 year warranty when building on a budget the evga 500w 80 plus is a great choice at a low cost supporting 40a on a single 12v rail provides more options without having to reduce your component requirements save space with the 500ws compact design well placed power switch a