We didn’t benchmark the cards at 2560x1600 because the game doesn’t support resolutions above 1920x1200 pixels.
The Radeon HD 4850 CrossFire subsystem wins in every tested mode. It is over 50% faster than the GeForce GTX 280 but its bottom speed is no higher than 20fps. It means the game may be jerky and sluggish in complex action-heavy scenes. Still, the average frame rate of the Radeon HD 4850 CrossFire is high enough for you to try display resolutions higher than 1280x1024 in Call of Juarez.
Call of Duty 4: Modern Warfare
The Radeon HD 4850 CrossFire isn’t good here. Although its performance doesn’t plummet down as that of the Radeon HD 3870 X2, it is only as fast as the single Radeon HD 4850. The CrossFire subsystem can almost match the GeForce GTX 280 at 1920x1200 yet its full potential remains untapped.
The GeForce GTX 280 wins at 2560x1600. The amount of graphics memory is not the cause for that considering the results of the GeForce 9800 GX2 which has a total of only 512 megabytes. Therefore we cannot explain the performance of the Radeon HD 4870 which should be far faster than the Radeon HD 4850 like at the lower resolutions, but the difference between them becomes negligible at 2560x1600. Well, the speed is high enough for you to play the game even at 2560x1600.