Corrupted Graphics

[coyote]

Hi

Just started getting corrupted graphics in various different games.

http://i83.photobucket.com/albums/j282/neilyc/nfs.jpg
http://i83.photobucket.com/albums/j282/neilyc/nfs2.jpg
http://i83.photobucket.com/albums/j282/neilyc/screen1.jpg
http://i83.photobucket.com/albums/j282/neilyc/screen2.jpg

But HL2 works fine with no problems

ATi x800 GFX card with CCC 6.11 driver
1GB Ram
AMD 64 2800+

I have reinstalled the games but no luck

Any ideas?

TIA