We patch Crysis to v1.21 and run it in DirectX 10 mode with High detail settings. We use 1,680 x 1,050 with 2x AA and no AF to give a reasonably real-world test without the risk that the graphics card will be a limiting factor to CPU performance.
We load a save game in the Relic level and play the game for roughly three minutes, following a strictly defined sequence of actions and movements. We repeat this test three times, or until a reliable set of results is achieved. The consistent results are then averaged to give the figures below.
This is the best way to test how a CPU affects game performance, as the game will be generating AI and physics and game rules for the CPU to perform. A timedemo addresses a CPU in a noticeably different way.
Crysis v1.21, 64-bit, DX10, High, 1,680 x 1,050 2x AA no AF