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.
HD 5770 - Here we see no real change.
HD 5850 - We see that at 1680 x 1050 the minimum has dropped off slightly.
HD 5870 - Here we see no real change.
HD 5970 - We see a MASSIVE boost at the 1680 x 1050 minimum for some reason. We checked multiple times and each time it spat out the big jump.