This review is for the creme de la creme of the be quiet! Power supply series with an 80PLUS Platinum rating the Dark Power PRO 10 850 Watt PSU that is truly the best that the be quiet! company has to offer. It was commissioned to be made in the highly prestigious Seasonic power supply factory. One of the best power supply factories in the world. Other brands of the be quiet! line are commissioned by different fabricators and should not be compared with this product or this review as they are manufactured in other places and have a different sources and therefore may have different design tolerances and characteristics. This review is based solely on the be quiet! (BQT-P10-Unit) and they include the Dark Power Pro 10 series including the 1200 watt / 1000 watt and the 850 watt models that are all commissioned with the Seasonic manufacturing plant.