Corsair HX850 V2 850 W @ techPowerUp
 

The Corsair HX850 has been in production for many years. Its successor has many improvements to show, including Gold efficiency and a new look similar to the HX1050 unit. Fan noise is also under control, the unit will go passive at low loads.

http://www.techpowerup.com/reviews/Corsair/HX850_V2/