Corsair HX1050 1050W Power Supply Review @ OCC
 

The Corsair HX1050 performed very well overall. The DC voltage regulation is excellent and in combination with what as to be said are only satisfactory noise/ripple levels still means decent DC quality. The efficiency fell a little short of the 80 Plus Silver requirements following the OCC power supply testing methodology but not by much and a maximum efficiency of 89% is still pretty good.

http://www.overclockersclub.com/reviews/corsair_hx1050/