NVIDIA 8800GT crash

[happysleeper]

I have CoD ver. 1.00.14413 (latest as of now).
8800GT with 0.5G RAM.
After a few minutes in game, the screen goes black, but the game continues to run. I can hit ESC and leave the game.
In the event viewer of my Win7 Ultimate 64-bit (4G RAM), the crash message says: "Display driver nvlddmkm stopped responding and has successfully recovered."
I tried 4 different versions of NVIDIA drivers - no help.
Changing the resolution and complexity of the game doesn't help either.
I searched the net, forums, etc. - but found nothing that helps.
Does anybody have any idea what can be done?
8800GT is not a bad or outdated card...
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