Performance in RPG
Although the Radeon HD 4870 CrossFire subsystem has a good average frame rate, the game is only playable at 1600x1200/1680x1050. At a resolution of 1920x1200 the speed is fluctuating wildly, occasionally dropping below 20fps. There are no such fluctuations with the Radeon HD 4870 X2, obviously due to the increased amount of graphics memory.
The CrossFire tandem lacks graphics memory to run the game at 2560x1600 whereas the graphics solutions with 896MB to 1GB of onboard memory deliver quite playable frame rates.
The Elder Scrolls IV: Oblivion
The game loses much of its visual appeal without HDR. Although some gamers argue that point, we think TES IV looks best with enabled FP HDR and test it in this mode.
The Radeon HD 4850 CrossFire reveals the full potential of this game, and the more advanced CrossFire configuration based on the Radeon HD 4870 cannot add anything to that. Unfortunately, both platforms have unpleasant fluctuations of speed in open scenes at 2560x1600, from a comfortable 68-72fps to an unacceptable 11-14fps. The Radeon HD 4870 X2 is better thanks to 1 gigabyte of memory available for each of its GPUs.