me and the others in darkp have been experiencing trouble related to this lately too.
no matter what machine we run off, paintball2 runs at 100% CPU usage (no matter how fast the processor) and ramps up temperatures on both the CPU and GPU. Reed and WonTon both had trouble with their GPUs overheating (restarting/shutting down like the mimi here), and I have had CPU problems too (which i had to sort out with new thermal paste, etc..). The university machines just died after about 5 mins running, though i wasnt to ready to tell the technicians exactly why...
anyway, the thing is why does Paintball2 hose your processor(s)? thats pretty counter-intuitive given the age of the game engine, so i can only put it down to some sort of bug in the renderer/game engine. Its not the drivers because ive tested it on many machines with different CPU's and different graphics cards of varying makes and models, and of course speeds; they all run at full whack and depending on the cooling available - overheat.
- Dagless