www.hardocp.com [H] did benchmarks on D3 with i.d.'s supervision. Most notable, nVidia cards seem to have teh upper hand most of the time and AMD/A64 CPU's are the prefered CPU's to be used. Note: No actual computer can play doom 3 at it's fullest because of it's uncompressing texture system. Although it is possible to play it on "Ultra," it will be laggy because of textureswamping, it is highly recommended to have at least 1 GB of RAM and a 256MB video card in doing so (the 1GB will help lower the texture swamping, but it won't remove it). If you want more information on it, read the benchmark done on [H]ardOCP.