Yeah those Catalyst drivers seem to cause a lot of people problems. I had no end of problems trying to get them to work myself. And even then I've never been able to get the card to run in AGPx8.

I probably won't buy an ATI card again, apart from the driver problems I've also had issues with the card itself. For one thing, it occasionally fails to refresh graphics properly. A more annoying issue is that it actually redraws some types of graphics a lot slower than my technically supposedly-much-inferior previous card.

My previous card was an nVidia and I never had any problems with it.