Crysis 2 uses a development of the Crysis Warhead engine optimised for efficiency but adds DirectX 11 support via a patch and this can be quite demanding. As, for example, with tessellation, implemented abusively in collaboration with NVIDIA with the aim of causing Radeon performance to plummet. We have already looked into this issue here
Although we have presented the results obtained with tessellation for information, as it's interesting to see what the Radeon HD 7970 brings to the table here, we only used the results without tessellation in the calculation of the index.
We measured performance with Fraps on version 1.9 of the game.
The higher you push the graphics settings, the higher the gain given by the Radeon HD 7970. It increases to 56% when the abusive tessellation is on.
The two Radeon HD 7970s in CrossFire X allow you to play Crysis 2 very comfortably in surround, even at high graphics settings.