My Intel did that do. Eventually I added a wait state in the BIOS setup and cut a "blowhole" in the top of the case to make it easy for hot air to get out. I was able to drop down to just 3 fans that I added. CPU, back of case and the blowhole.
Other components can become heat sensitive and to sniff that out, I leave the cover off.
As always, the power supplies are "super sized"
Running a home built with a Shuttle main board, AMD 2400+ XP (2 GHz) processor, 512 Meg RAM, two HDs, XP Home SP1, tower case with seven (7) fans.
All of a sudden, when machine idle, running SETI@Home screen saver, the machine freezes, and the HD LED is on steady. Been running this setup for over a year, zero problems. Motherboard monitor shows processor temp of 55 C. Well within tolerances.
If I'm surfing, or whatever, zero problems. If I walk away, after a while I come back and the screen saver is frozen. No keys will work, mouse pointer not there, nothing will bring the machine out of the screen saver. Have to hard boot.
Forcing screen saver into action will not duplicate the problem.
I thought there might be a log somewhere but don't know where to look.