About a year ago i started experiencing problems playing full screen games. After a few minutes, the monitor would go into standby mode and then the computer would lock up. I'm thinking the video card might be going bad, its a 4 year old GeForce 6800GT. I picked up a laptop and put my desktop woes on the back burner. Anywho, i've decided to look at it again. The desktop runs fine as long as i dont play games (either full screen or in windowed mode). I've tried several driver versions and also reinstalling windows. The inside of the case is pretty clean and dust free also. Does that sound like a defective video card? Is there anything else thats as likely to be the cause of the problem? There is a 9500GT on newegg for $30 after rebate, so i figured i'd pick that up. Thanks in advance!