AMD 955BE Temp Threshold

It's a bit hot but it certainly should not shut down at that temperature. you are talking about the "core" temperatures right?

Yea, all 4 cores were reading about 65c when it shut down. I think I found the problem though. My RAM voltage was too high. I was running 1333mhz @ 1.8v 9-9-9-24 timings... voltage was too high. I adjusted it back to 1600mhz @ 1.8v 9-9-9-24 timings... Prime95 ran for an hour no issues so far.