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.
We can see here the single card struggles at the highest resolution. The problem isn't seen here with some big numbers being shown. For the most part the setup does fall behind the HD 5970 but there's no denying the numbers.