Doom 3 performance was measured using the built-in demo1 demo with the second of two benchmark runs being used as the result. A single MSI NX7800GTX is so powerful that it produced an impressive 64 frames per second (fps) at a resolution of 2048x1536! SLI increased the average frame rate by 55% to 99 fps.
With 4X in-game antialiasing (AA) enabled, a single NX7800GTX managed 50 fps at a resolution of 1600x1200, while SLI boosted the average frame rate to 85 fps - a 72% increase. With 4X AA enabled at a resolution of 2048x1536, SLI achieved an average frame rate of 60 fps.
Doom 3
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Monitors that support resolutions over 1600x1200 help to maximize the benefits of SLI. However, a big screen monitor isn't necessarily a requirement as higher levels of AA can be used at lower resolutions. Doom 3 supports 8X and 16X antialiasing and SLI scored 86 fps with 8X AA (72% increase over single) and 60 fps with 16X AA (92% increase over single) at a resolution of 1024x768.
Be sure to check out the interactive AA image quality comparison following the benchmark charts to see the benefit that 8X AA and 16X AA bring to Doom 3.
Doom 3 Graphics Settings
Note that anisotropic texture filtering optimizations are not in effect for OpenGL applications such as Doom 3. If anisotropic optimization is set to on in the driver control panel, the resulting effect will be off when running OpenGL applications.
Doom 3 Performance - No Antialiasing
Gamma correct AA and supersampling transparency AA, which applies AA to alpha textures, did not affect Doom 3 performance.
Doom 3 Performance - 4X Antialiasing
Doom 3 Performance - 8X, 16X Antialiasing
ANTIALIASING QUALITY
The following javascript applet demonstrates the effects of each level of antialiasing that is available in Doom 3. Clicking the links underneath the image will reveal the screenshot that was taken with the chosen method of antialiasing enabled. Be patient while the image is downloaded from the server as they average around 50 KB in size.
After each image is downloaded and saved in your browser cache, you will be able to quickly switch between them. The colored numbers indicate the levels of antialiasing that produced a significant image quality improvement in the marked area.
Note: To obtain the intended results of this image quality analysis, please set your Windows desktop resolution to 1280x1024. Then position your eyes about 12 to 18 inches from your monitor as you compare the images being presented by the applet.
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