A box running too hot maybe?

> I am having a really hard time troubleshooting why my box will randomly
> freeze. I am running a SuSE 6.4 box w/ 192 MB RAM, a Diamond Speedstar A55
> 8MB AGP video card, a Voodoo2 card, an Ensoniq ES1371 sound card(?), a
> D-Link(tulip) NIC, and I can't remember the name of the motherboard with an
> AMD K-3 333 chip. On occasion, for reasons I can't figure out, my system
> will all of a sudden completely lock up. The user input devices will not
> respond at all, and I have to do a hard reboot. It seems to be doing this
> with increased frequency lately; I used to think it was a software
> problem(something to do with the drivers for my sound card) but I'm now
> starting to suspect maybe it really is a hardware problem. Any guesses
> and/or recommendations would be greatly appreciated in figuring out what's
> causing this to crash.