Lately I've had an issue with ATITool completely freezing my computer when I click the settings button in the program. I've never had this issue before with ATITool. I have an X800 Pro, P4 2.66ghz I had OC'd to 3.2 but I dropped it back to stock to test this problem, but no dice. I have the Catalyst 6.4 drivers. The only thing that I've changed recently was I added another 512mb of ram to my system. Any Ideas anyone? I'm stumped.