Ok, so this problem has been going on for a while... Any game, at any settings crashes my computer after playing constantly. The time varies with the games. What happens is it repeats sound for about 2 seconds, and the monitor turns off, yet the computer remains running.
What is this caused by?
Your video card is overheating, get a better cooling system,
Maybe take off your door and put a small fan on facing your computers inards, to help keep it cooler.