Games Benchmarks - OpenGL


Doom 3: Resurrection of Evil

Doom3 brings a fully shader enabled environment to OpenGL, utilising the functionality of OpenGL1.3 and above. Although the title makes use of elements made available in "DirectX 9 class" hardware, Doom3's primary rendering characteristic, being its unified lighting model, requires plenty of stencil fill-rate and a lighting shader that can be achieved in a single pass per light in DirectX8.1 equivalent hardware. Here we are using a timedemo recorded in the recent add-on for Doom 3: Resurrection of Evil (RoE)

Doom3: Resurrection of Evil (FPS) 640x480 800x600 1024x768 1280x1024 1600x1200
7800 GTX 60.6 60.4 60.2 59.8 58.2
6800 Ultra 61.2 60.7 60.3 58.7 53.8
7800 GTX SLI 59.7 59.5 59.6 59.5 59.5
6800 Ultra SLI 58.4 58.3 58.2 58.2 58.1
7800 GTX % Faster than 6800 Ultra 640x480 800x600 1024x768 1280x1024 1600x1200
Single -1.0% -0.5% -0.2% 1.9% 8.2%
SLI 2.2% 2.1% 2.4% 2.2% 2.4%
% SLI Increase 640x480 800x600 1024x768 1280x1024 1600x1200
7800 GTX -1.5% -1.5% -1.0% -0.5% 2.2%
6800 Ultra -4.6% -4.0% -3.5% -0.9% 8.0%

This Doom 3: RoE test is showing itself to be highly CPU limited under normal rendering, with only the 6800 Ultra beginning to show any significant graphics limitation at high resolution.

Doom3: Resurrection of Evil, 4x FSAA & 8x AF (FPS) 640x480 800x600 1024x768 1280x1024 1600x1200
7800 GTX 60.1 59.3 57.0 47.0 36.7
6800 Ultra 59.6 58.0 51.1 38.3 29.5
7800 GTX SLI 59.3 59.3 59.3 58.9 55.7
6800 Ultra SLI 58.4 58.2 58.1 55.3 48.9
7800 GTX % Faster than 6800 Ultra 640x480 800x600 1024x768 1280x1024 1600x1200
Single 0.8% 2.2% 11.5% 22.7% 24.4%
SLI 1.5% 1.9% 2.1% 6.5% 13.9%
% SLI Increase 640x480 800x600 1024x768 1280x1024 1600x1200
7800 GTX -1.3% 0.0% 4.0% 25.3% 51.8%
6800 Ultra -2.0% 0.3% 13.7% 44.4% 65.8%

With 4x FSAA and 8x AF enabled the performance is a little more graphics limited and as such the 7800 GTX is able to outperform the 6800 Ultra by 25% at high resolution. The 7800 in SLI more still stays fairly CPU bound.

Doom3: Resurrection of Evil, 8xS FSAA & 16x AF (FPS) 640x480 800x600 1024x768 1280x1024 1600x1200
7800 GTX 58.4 52.8 40.0 28.3 18.6
6800 Ultra 52.2 41.6 30.9 18.7 11.8
7800 GTX SLI 59.9 59.2 58.1 51.4 34.4
6800 Ultra SLI 59.0 56.8 54.1 35.8 22.6
7800 GTX % Faster than 6800 Ultra 640x480 800x600 1024x768 1280x1024 1600x1200
Single 11.9% 26.9% 29.4% 51.3% 57.6%
SLI 1.5% 4.2% 7.4% 43.6% 52.2%
% SLI Increase 640x480 800x600 1024x768 1280x1024 1600x1200
7800 GTX 2.6% 12.1% 45.3% 81.6% 84.9%
6800 Ultra 13.0% 36.5% 75.1% 91.4% 91.5%

With 8xS FSAA and 16x AF enabled the performance difference between the 7800 GTX and 6800 Ultra increases to 58%, while the SLI configurations are able to stretch their legs a little more, giving over 80% performance increases, although the actual FPS just in the 30's at high resolution for the 7800.