"I just had that kind of problem, I upped the critical temp in the bios and took .04 Mhz off the CPU. Now it doesn't lock up or restart from heating problems."
Took it down from 166 to 150 fsb, knocked vcore voltage down from 1.750 to 1.7 and all is well. Instead of AMDXP 2700, shows up now as a 2400 but, windows isn't showing it's operating speed. You know when you right click My Computer>Properties it'll give system info??? Right after it lists the 1gig system ram, it doesn't list anything else. Usually, it would list the actual operating speed.
Anyway, I ran cpuz.exe and it showed my cpu now running at 1.950 which has me a little depressed since I o'c'd it over 2gigs. Believe it or not, seems like I slam around the internet almost as fast and after intense playing, no more crashes.
Is 50c at idle REALLY that bad?!?!?! Since 85c is the anti-burn cut off, didn't think it was THAT bad.