that was referring to the filtering or texture quality seperation problem. Regarding the pink surfaces with AA, for some reason I can no longer reproduce this in the stress test? But it happened on both my comptuer and a friends when we did clean installs of your driver and ran the CS: Source stress test. I started up HL2 single player and started playing and in the middle of the map switched AA on and no pink surfaces appeared. I then ran the stress test again and no pink surfaces apeared anymore, don't know the problem behind it. But the game looks perfect now so I am rather happy.