That is the question. How hot can these cards run? I'm not having any heat issues. This is my 1st "mega" card Previous cards 3850/4850 always ran in the 50C/60C range This is with fan set to auto, playing BF3
With a stock setup, anything under 80C is in the comfortably cool range. For example, the stock HD4850 scored a nice 87C at load in TR's review, a temperature that ATI apparently felt was ok. I wouldn't worry too much about it. If it gets to 90C while gaming, you might want to clean the heatsink out though.