Display Drivers not responding.

I recently purchased this http://www.tigerdirect.com/applications/SearchTools/ite...
I installed it and started experiencing some serious problems. When i do anything slightly stressful on the system (mostly gaming) the game runs fine but after a few minutes (sometimes seconds) into gaming the screen will freeze, go black, then come back again. I get a pop up that says "Display drivers have stopped working and have recovered". This is extremely aggravating and stressful for me seeing as ive read a few things on this problem and all the trouble shooting ive done has got me no where. Ive tried keeping the system cooler, adjusting the OC, giving the cpu a bit more voltage, updating drivers, and taking the radeon 6450 i had in (with dual graphics enabled). The motherboard i have in here is a Gigabyte A75M-S2V.