I have the Cooler Master GeminII S524 cooler, and get idle temps around 10 degrees. I have overclocked to 4.5GHz (would go higher, but I can't seem to get it stable past there) and haven't broken 45 degrees at full load. With a full 1GHz overclock, I haven't broken 45 degrees. I'm not all that experienced with computers, but even I know that that is incredibly low, and I can't seem to figure out why. Anyone have any ideas?