I recently upgraded my computer to the following hardware and operating system. I just formated last night, so everything is "brand new" Nothing is overclocked. I updated the drivers to the latest ones on the AMD site.

Now here is my problem. While playing Black Ops, I was able to play a couple of games, things where running great,  but when I went to change a class or even exit the game the screen would go to black and not respond. No mouse, nothing. So I had to restart.

After the restart I left it alone for a bit and the screen turned off, which I thought was fine (screen saver) but when I went to move the mouse to wake it up, it would not respond.

I am wondering if this is a common issue with the 6870s or if it is just the drivers that are causing the issue. Any ideas?

Motherboard: Asus P5Q Deluxe
CPU Intel Quad Q9400 2.66
RAM 8GB Kingston
Video Card Sapphire HD 6870
PSU OCZ Modxstream Pro 600W
Monitor Samsung 21.5"
Hard drives: 500GB SATA
Optical Drives: DVD RW
Additional PCI cards: Soundblaster Titanium HD
Number of fans present: Antec 900 Case

Operating System : Windows 7 Pro 64 bit
Video Card Drivers in Use: The latest 11.11
Motherboard Drivers Used: The ones Windows updated.
Apps/Games causing issues: Black Ops
System clean of viruses / spyware etc: Yes