So yesterday I was playing the Sims 3 & my character was just about to sleep with his super ridiculously rich best friend's wife (for the money of course) when my gameplay froze. My iMac was so overheated. When you put your hand on top of it, your hand would practically burn. Not normal..right? Anything I can do to fix this problem or should I just disregard it? I have the iMac 21.5" ATI Radeon 4670, 1 TB. So if anyone can tell me what's going on, that'd be really great. My iMac also encounters the whistling problem (which is super annoying). Should I just replace my iMac (again)? The game was played in a windowed mode at like 1280 by ____ (I always forget the number haha). So is my fan at fault or what?