The NVIDIA GeForce GTX 580 single-card and SLI solutions were both playable at 2560x1600 with 32X CSAA, 16X AF, Very High in-game settings, and the High PhysX setting. This is as high as the game will currently go in DX9.

The AMD Radeon HD 6970 single-card and CrossFireX solutions were both playable at 2560x1600 with 16X AF and Very High in-game settings, but without PhysX enabled. The dual-GPU Radeon HD 6970 CrossFireX setup was playable with 24X CFAA, and the single-card HD 6970 was playable with 8X MSAA selected.

The NVIDIA GeForce GTX 570 and AMD Radeon HD 6950 were also playable at 2560x1600 with 8X MSAA enabled. The GTX 570 was able to utilize the High PhysX setting, while the HD 6950 does not support PhysX at all.

The Radeon HD 6870 was a great performer at 2560x1600 with 4X MSAA selected. The GeForce GTX 560 Ti was likewise playable at that resolution with 4X AA, but was also able to use the Normal PhysX setting.

When DX11 becomes workable, these performance levels will probably change. We do expect some performance hit to come with enabling DX11 in this game, due to the advanced features that it uses. However, we also believe that the 50%+ performance hit we witnessed is exaggerated, and the result of bugged implementation. Certainly the stuttering and crashing aren't acceptable and can't be called normal, but some performance decrease with HBAO, MVSS, and Tessellation is expected. These issues are known, and we await the fix.