To further combat excessive power consumption, Intel redesigned its processor architecture completely. AMD on the other hand just tweaked its K8 architecture for more efficiency. The Socket AM2 Athlon64 X2 4800+ processor is one of AMD's 65 nanometer parts, moving it onto a smaller manufacturing process has helped AMD cut power consumption rates to 65W. The Athlon64 X2 4800+ idles 13W less than the X2 5000+, and 20W lower than the single core Socket 939 Athlon64 4000+. It's under load where we see the real power savings



Link: PCStats