What did the temps get too? Although my old 4850 did survive going to 100-110C, temps in the 90-100C range could cause problems. Unless you have the single slot reference 4850, temps should be much lower than 100C (more in the 50-80C range).
80-90C, I was just playing Crysis Warhead then.
Now my problem is the game will run but there are so many glitches and red dots appear and screen goes blue etc.
It's weird because yesterday it ran fine.