So I recently changed my thermal grease on my Palit GTX 560 OC GPU and decided to overclock it to reach it limits. I used AfterBurner and at first the Core clock wasn't going upper than 999Mhz. I read some forums and it seemed that is a driver problem that on v300 of it and upper the limit appears. So I downgrade my NVIDIA driver to v295.73 and I was able to pass the limit but now there is another problem - every time I launch an 3d app (Far Cry 3, Tomb Raider : 2013) it crashes after some time (at 1004Mhz clock) or even won't launch. The temperature was around 70~79 C which I think is normally and the fan was on 100% power. Then I thought the problem was in the core voltage but I set it at 1200 mV and nothing changes but some games crash after more time. I modified the VGA Bios to pass the 1087 mV core voltage limit on it and I don't think going any futher than 1200 mV will solve my problem. Any ideas why this happens? EDIT: But I want to add that at 1200 mV my GPU temperature is rising very quick and nearly hit the 100 C.