The IN WIN Commander 1200W performed very well during testing and I have no problems to report. The DC rail voltages all held up very well even under full load and the AC ripple/noise levels were acceptable but did however get quite close to the ATX12V V2.2 limits. The requirements for 80 Plus certification were met with a maximum efficiency of 86% and although not quite meeting the 88% claimed it is still to be commended.