Not OC related but my 3850/F1A75-M Pro stock speed with 4G 1600ram at 1.5v, a single 64G SSD and a Fusion5 Gold tuner all running off an ancient Antec 420w Neo PS pulls 60w at desktop, 90-98w watching HDTV (no matter full screen or not) and 115w playing an Indie game full screen. Come to think of it, the external M-Audio box is USB powered. Pretty light weight for a GP rig.