Description of the problem: Everytime I launch a 3d application, my pc decides to hard crash and reboot, this happens 2 seconds after viewing a 3d animation on my screen, meaning if a game has a 3d animated menu, it will crash, if it doesent, it will crash as soon as i get in the game. I've tried several 3d apps now, including Warhammer Online, Spore, GTR 2, 3d Mark Vantage, STALKER and the problem occurs with all of them. The only interesting thing is that Warhammer works fine if i edit the user settings file and make it run in windowed mode. Switching it to full screen crashes it instantly. Specs: ASUS Rampage Formula w/ Intel x48 chipset Intel Q9550 @ 2.83ghz Core 2 Quad Corsair Dominator 1066 2x 2gb Sapphire Hd 4870x2 2gb Seagate 500gb PSU: Coolermaster M700 700 watts Windows Vista 64 bit, SP1 Things I've tried: Changing the 8 and 6 pin PCI cables to the card Reinstalling Ati Catalyst drivers and motherboard drivers Using an older version of Catalyst Unplugging everything but the bare necessities in the pc Plugging the PSU into different power outlets in the house Monitoring temperature Running the 4870x2 at 100% fan before running app to ensure its not overheating Using a household fan pointed to and from the pc for airflow The only idea I have left is reinstalling windows with a 32bit version and possibly XP, other than that, I've got no idea what to try.