Actually, the Core 2 Duo runs extremely cool for the speed. In fact, while not recommended, some people have ran it without a heat sink and found the chip to run at about 30C and stable. The Core 2 Duo runs at about 1.8GHz-2.7GHz, which means it's a lot cooler than the P4 D which were running at 4Ghz. So I guess I'll just have to buy a heater this winter.