Crash?
When it crashes, does it give an error message or does the computer freeze? Does it crash to the desktop, or is it impossible to do anything and you end up rebooting? My suspicion based on my own experience is to point at overheating. If a CPU gets too hot it'll destabilize the system, but if it's crashing to desktop or giving error messages it's likely something else. Anyway, my 2 cents... (not worth a wooden nickle)
When it crashes, does it give an error message or does the computer freeze? Does it crash to the desktop, or is it impossible to do anything and you end up rebooting? My suspicion based on my own experience is to point at overheating. If a CPU gets too hot it'll destabilize the system, but if it's crashing to desktop or giving error messages it's likely something else. Anyway, my 2 cents... (not worth a wooden nickle)