This is one of the newest power supplies from Corsair, using state-of-the-art DC to DC power conversion that helps boost efficiency up to 90% under most conditions... and earning this unit 80 Plus Silver certification. It is also a modular power supply, making cabling nice and clean inside your computer, and the 140mm fan is quiet compared to most other power supplies in this wattage range. If you are looking for high quality and efficiency then you can't go wrong with the Corsair HX 850W.