1000 Watt PSU from EVGA, been in my primary rig for 4 years and has been absolutely flawless with alot life left in it.

Below is the manufacturers blurb:

-EVGA 1000 G3 "The Next Generation in Power"

-80 PLUS Gold certified, with 90 percent (115VAC) / 92 percent (220VAC~240VAC) efficiency or higher under typical loads

-Fan size/ Bearing: 130mm Hydraulic Dynamic Bearing for ultra quiet performance. Operating Temperature 0° to 50° C

-Heavy duty protections, including OVP, UVP, OCP, OPP, and SCP