well, about a month ago, my sound card popped out of my slot because i moved the computer While it was on, causing everything to go fubar on me, my bios crashed, my comp didnt even boot, so what i ended up doing was giving it to the guy who made my comp for me, and he ended up having to put a new hard w/latest bios so it can work again, and now what i have is a HDS 80 gig hd w/ 3meg buffer, but thats all that was new.. the only other thing I installed before that was my vid card, from a 64 mb gf2 ti, to a gf4 ti 4400 128mb, but i doubt its a vidcard overheat..
And just as a test, i let my computer sit idely for about 5 hours now, and just now I started using it and not seeing any problems. My MBM reads a stable 51c temperature, same as it was when i first turned it on this morning, so im kind of leaning to the fact that it might be an overheat problem maybe?