Not sure if your graphics card is up to the task? Do you need an upgrade to play Doom III? It is worth upgrading? And if it is, to what? These are all questions probably on the minds of many of our readers since this game was launched. Doom III pushes gaming graphics to the next level, and if you don't have a card with sufficient juice, you could be left out in the cold. That's why its so useful to read this article from Xbitlabs on comparing Doom III performance on differing video cards. There's plenty of good advice on what settings to use for whatever card you have, and what kind of performance you should expect from your card.