The Tech Report is carrying a [url=http://www.techreport.com/etc/2004q3/ati-doom3/index.x?pg=1]nice article[/url] on some problems that have creeped up while running Doom 3 on ATI video cards. If you are an ATI user I suggest you head on over and check it out. It discusses the problems, explains how to fix them, and shows you benchmarks before and after. Yet another very thorough article by the Tech Report guys.