Hey guys, I have been trying to figure out this problem but with no avail, so any advice is greaty appreciated! Basically the problem occurs when running any type of game(wow and ffxi to name a few but occurs with everyone) and then tab out to wither youtube fraps and the like, the screen goes totally black and I must restart the computer. Ive wiped the HD several times and have redone even to the most basic setup and it still occurs. Specs are as follows Motherboard: Asus maximus v extreme Intel i7 3770k 16gb Corsair Vengeance 1866 250gb SSD 850w PSU 2x ASUS Radeon HD7850 2gb Ive made sure all drivers are up to date. I have run memtest on both sticks of ram and they seem to pass with no errors, when only 1 video card is plugged in I have no problems it seems to have something to do when they are crossfired, I ve tried 3 different bridges and still same result.