I just got my new iMac (2,66 ghz, 2 gig ram, ati radeon 2600 HD pro, 500 HD). It seams that every time I play a HD movie, or play a game with windows running on bootcamp, my mac just turn off, because it got too hot. No problem if that happens once, but it happened 7 on one day. I'm going back to the store tomorrow to check what's wrong, but I think it's just too much power without a good cooler. anybody with simular problems?