Loved the way Ct turned up the info on the 80 plus certification.. And yes, it was Corsair which itself decided to downgrade the unit to 80 plus silver when they could've easily marketed them as 80 plus gold.. Now, leaving the certifications aside, the Corsair model exhibits better overall part and build quality.. If pricing has to be considered though, there is the XFX 850 Black Edition to consider.. It is based on the Seasonic M12D 850 design and is a gem of a performer.. The color scheme though won't be to everyone's liking..