S.T.A.L.K.E.R: Clear Sky:

S.T.A.L.K.E.R: Clear Sky is another game that takes advantage of the capabilities of DirectX 10.1, and it also happens to have a free downloadable benchmark.  Set in the time period before Shadows of Chernobyl, the player assumes the role of a mercenary in a radioactive wasteland.  Based on the X-Ray 1.5 engine, Clear Sky makes for a popular benchmark. 

For the single GPU cards, testing was done at 2560x1600, with all other settings maxed out, including DX10.1 rendering and 4xMSAA. 

The first run was done with the HD4890 2GB, and we have average framerates of 12.9, 11.4, 12.1, and 8.7. 

The HD5770 was run next, with average framerates of 10.7, 9.8, 10.5, and 7.4 frames per second.  This means the HD4890 leads the HD5770 by 20.6%, 16.3%, 15.2%, and 17.6% respectively. 

Intro Card Layout Test Setup and Methodology 3DMark Unigine S.T.A.L.K.E.R: Clear Sky X3: Terran Conflict Crysis: Warhead Overclocking Conclusion