I recently got rid of my GeForce 4 Ti 4200 Card and installed a GeForce 6600 card. I was playing World of Warcraft with the Settings Maxed out for an hour or so when the screen went black and the monitor started popping as if it was trying to adjust the display. The popping continued until I powered down the PC. I inspected the card and started back up again. I lowered the settings on WoW and did not have any problems the rest of the night. Note: I recently downloaded Battlefields 2 Demo and installed the Nvidia drivers, which came with it (which Windows said it did not support). Any idea if this is a driver issue or a card issue? I would appreciate any help or knowledge you could supply me with. Thanks.