I was playin medal of honour today (Sunday when it was real hot) Suddenly it crashed! Yikes. I quickly reset my PC and the CPU was running @ 81C..... hmm time for a new PC me thinks.....:oD.
I did put a quiet fan on it though which i guess doesn't keep it cool as well.
To your problem. You may want to check to see if you can get a fan that may keep it cooler, also i should check on AMD website to see the max temp for ur CPU. Mine is 100C!!!! I used to encode whole films which would take about 5-6 hours @ 100% and the temp would occasionally reach 70C.
I'd just keep and eye on it for a bit. CPUs are funny like that!!!