When Linux is the topic, the GPU hardware is often what is moaned over caused by lacking drivers and (often therefore) vaning performance. [url=http://www.anandtech.com]Anandtech[/url] has recently released a roundup of the current graphic cards used in a more graphic-intense environments, such as games. It is not all that surprising to learn that although ATi has promised to improve their linux drivers for the radeon series, they are still a bit behind nVidia whose drivers actually seem to work quite good. You can read the whole roundup http://www.anandtech.com/linux/showdoc.aspx?i=2229