I think you might be right. After I had in on for a while after cleaning, it crashed again. Next time I start it up I'll put a desktop fan and maybe something cold inside for cooler airflow and see how it handles. I admit it does get quite warm in the room, but I have a BIOS alarm set to go off when the comp reaches 140* and it doesn't go off. So I'll test the overheating issue next.
edit: Ouch, no doubt it must be overheating. Just the video card processor, which is finger-melting to the touch. (Which explains the bios alarm not going off, it doesn't watch vid card temp)
Any advice on cooling that down, other than under-clocking it, or a different cooling system. (couple of case fans for now)
I noticed graphic are still messed up if I restart immediately after a crash, since it doesn't have time to cool... SIGH!!!! The downfall of a beefy computer, requires beefy cooling