I just bought a Geforce 640mb 8800 gts video card. When i'm playing games every once in awhile, well pretty often, my screen will go blank and i have to turn my LCD screen off and then back on and the screen will come back on. I thought it might have been overheating at first but the temp stays between 70c and 76-78c. I also don't know why this would cause me to restart my monitor and it would work again. Anyone know anything about this?