High Quality AA and AF
Our high quality tests let us separate the men from the boys and the ladies from the girls. If the cards weren't struggling before they will start to now.
Far Cry 2
With the detail cranked right up we see the NVIDIA offerings really shine. If you really want to play at this detail, though, you'll want to add the second card as it manages to smash that 30 FPS minimum we love to see.
World In Conflict
Under WIC we see the GTX 260 again offering some very good performance. Adding a second card into the mix does increase performance and takes it above that 30 FPS minimum we like, but the gain on a whole isn't great here.
Left 4 Dead
Left 4 Dead gets a good jump with the second card added, while the single card performance sits just ahead of the HD 4870.