hi, ive recently bought a new gaming pc, not the best but its ok. ive been playing world of warcraft on it and never seem to get any problems but i have just bought farcry 2. the game its self runs smooth and the graphics are gd but for some reason after maybe 30 mins the screen goes blank and says no signal, there for having to restart me comp. i will then try to play it again and maybe this time after a hour it will do the same thing. has any 1 got any ideas to y it is doing this... please help thank you