i've got a epox 8khal+ mb, amd 1800 xp cpu, g3 ti200, 512mb pny, and some other things, and my computer locks up when the temperature hits like 104-5f or around 43c. right now i have the case open with a house fan pointing into it, and it runs fine, but it's too noisy. once i move the fan out of the way, in a few minutes, the computer locks up. i don't think it could be the video card because it even freezes in the bios, i don't think it is the cpu or memory because i tried those on a friend's computer with pretty much the same set up and the temp went past 45c and the computer was fine. could it be my motherboard that's having problems? right now, i moved the jumper switch to 133mhz and have the bios running in the fail/safe mode. it seems to lock up or heat up a lot faster now.