Far Cry 2
The Dunia Engine was built specifically for Far Cry 2 by the award-winning Ubisoft Montreal development team. It delivers the most realistic destructible environments, amazing special effects such as dynamic fire propagation and storm effects, real-time night-and-day cycle, dynamic music system, non-scripted enemy A.I. and so much more.
A minimum above 30 FPS at all resolutions is the main thing here and we can see the HD 6870 doesn't run into any problems. Compared against the GTX 460 1GB OC performance is close at 1680 x 1050. As we move up the resolution table the HD 6870 has no problems getting a lead on the model.