Hello, I'm having a problem with my computer crashing. I'm running Windows 7 Professional 64-bit. I currently installed a new graphics card: ATI Radeon HD 4800 Series. I installed this card so that I can play video games. When I first installed and tried play the games it started crashing ten mins into the game. Now that computer is starting to crash even when I'm not playing video games. I could really use some help DX. Thank you!