The S12II series is made up of 330, 380, 430 & 500 watts units, we will be reviewing the 500 watt model. Each of the Windows Vista™ ready power supply not only meets but also surpasses the stringent 80 PLUS® requirements. This feature combined with a power factor correction factor of 0.99, total computer system energy usage can be reduced by up to 20%, surpassing even the original S12’s performance levels.



Link: Hitechreviews