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 - At the higher resolution there seems to be a bit of a bump. This is something that is helpful as it moves us a bit further away from that 30 FPS minimum that the HD 5850 just scraped in at getting when running at 2560 x 1600.
HD 5870 - Like the HD 5850, we see a bump in performance here. The good news is that it seems to translate to all resolutions and not just the highest one.