Today, id Software released the official DOOM 3 Hardware Guide on HardOCP.com:
Our goal here is to help you understand where your system is positioned in terms of playing DOOM 3 and to help you choose an upgrade that will make a real difference and offer you the greatest improvement in gameplay for money well spent.
The guide certainly lives up to this goal, covering every nook and cranny of a variety system types in great detail. See it for yourselves, just follow the link.
