I built my first computer this year. Its been running perfectly fine for about two months. But now when I play games it will intermittently display grey vertical lines on my screen that completely override the game. I have to restart my computer to get rid of this screen. Sometimes it goes a few hours without doing it and other times it happens back to back. I have installed all of the most recent drivers for my graphics card and processor(amd fx 6300). I dont know if this problem is more with the card, or the monitor. Please help