The screen I am using is a Samsung 17" TFT. It is quite an old one but I've never had a problem with it so see no reason to replace it, and I'm playing on 1024 by 768. I've tried playing at different resolutions and that hasn't changed anything, also I should point out that it is not the 256mb model I'm using its the 512 so I don't think that can be the problem I've read the article that Jeremy posted now and gone through and all of the AA settings are turned off. I've gone through all of my hardware and can't see a weakpoint other than the HDD. I just want to say thanks as well for all of the help that I've got from these forums they have taught me a lot. Thanks a lot Dave