Whenever I play something graphic intensive, after a few minutes my computer will periodically 'beep', and I seem to remember on another computer, when screwing with the bios, there were options on what to do with overheating, and by default it was at _____ do a warning beep, is that what my computer is doing? This never used to happen before :S and only happens on games which I can hear the fan speed up, quite clearly (ie portal) and not games that are new enough to make some use of the graphics card but not push it anywhere near the limit (ie WC3). What should I do?