It's only OC'd to 4.1 GHz, but it's a hex-core so it does generate a bit of heat. Day-to-day it usually idles anywhere from 25-30C depending on ambient room temp. I have seen it as low as 22C when the room was very cold. Under a normal gaming load, it can hit 50-55C. I'll load up a game and report back - been decorating the house this evening!