I have the amd sapphire 7870 oc edition and I got the hdmi no signal error in game and i believe i heard the gpu fans speed up, but i don't think cooling is a problem as i have 3 exhaust fans and 3 intakes and a hyper 212 evo cpu cooler, and my temperature probes were only reading at around 36c which shouldn't be a temperature to crash at, and the game was sniper elite v2, i've had it happen in the past with shogun 2 fall of the samurai but that was three months ago now. Thank you for your help