World in Conflict
And again the CrossFireX tandems built out of Radeon HD 5770 and 5750 cards show their best, delivering higher average frame rates than the Radeon HD 5870 and HD 5850, respectively, in every test mode. Moreover, the HD 5750 pair proves to be ahead of the Radeon HD 5870 when FSAA and anisotropic filtering are turned off. The overall picture is not so bright, though. At the high-quality settings the cards with 128-bit memory bus suffer a performance hit, resulting in a rather low bottom speed. The same 128-bit bus is the reason why the Radeon HD 5770 falls behind the GeForce GTX 260 which copes better with the high-quality test modes. The Radeon HD 4770 is expectedly last.
The highly resource-consuming Crysis agrees with World in Conflict in that the CrossFireX configurations of the junior Radeons scale up well and compete successfully with the single top-end solutions, but both of them fall behind the Radeon HD 5870 and 5850 in terms of bottom speed when the memory bandwidth requirements grow up. The single Radeon HD 5770 is competitive to the GeForce GTX 260 and 29-46% ahead of the Radeon HD 4770.
Unreal Tournament 3
Unfortunately, Unreal Tournament 3 does not allow recording the bottom frame rate. But when it comes to average speed, the CrossFireX configurations are still ahead of the Radeon HD 5870 and HD 5850. It is only in the hardest test mode (if we can say hardest with respect to the UT3 engine) that the competing solutions are equals. Nvidia’s card still comes out the winner in the race between the GeForce GTX 260 and Radeon HD 5770. The latter is about three times as fast as the Radeon HD 4770, though.