I must say, the core 2 duo throws off a lot of heat when it's working. The temp at the upper left air vent is about 30 degrees F higher than the room, even with a Belkin laptop cooling stand under it. Your arm notices it a lot. Only one cpu running hard at 1600MHz, the other idling at 800MHz. My comparison is an Inspiron 1200 with a celeron M, which is notably cooler.