I built a PC the middle of last year, and ever since I've been having freezing problems. Either when I'm watching a video, or playing a game at random times my PC will completely freeze, forcing me to reboot. I've checked numerous threads and tried suggestions I've found there (testing different RAM, scanning for viruses, updating the bios/video card drivers, etc.) and so far nothing has worked.
At first I thought the card might be overheating, but even under a heavy load the highest temp it ever reached was 81 degrees (and that was only once while rendering an effects heavy video).
Any help anyone can provide would be greatly appreciated. I don't necessarily want to reinstall windows (especially since in some cases not even that worked for people), but I'll try that too if I have to.
CPU: Intel Core i7-2600K Sandy Bridge 3.4GHz
Motherboard: ASUS P8Z68 DELUXE/GEN3 LGA 1155 Intel Z68
RAM: G Skill 1067.2 MHz (PC3-17000) 16GB
Graphics Card: HIS Radeon HD 6970
PSU: Antec High Current Gamer 900W