Performance in Third-Person 3D Shooters
Just Cause 2
This game’s integrated benchmark does not report the bottom frame rate.
Just Cause 2 doesn’t use tessellation, but has the option of water simulation on the GPU. The Radeon HD 6870 has a GPU clock rate of 900 MHz, which has a positive effect on the speed of geometry processing. Even if the Barts core is only improved in terms of tessellation, the difference in clock rate alone is enough to make this game run at the same speed as on the Radeon HD 5870. That’s a brilliant achievement considering the difference in price between the Radeon HD 6870 and 5870. The Radeon HD 6850 feels good here, too. It equals the GeForce GTX 460 768MB at the two lowest resolutions and allows playing comfortably at 1600x900.
Lost Planet 2
The Barts’ higher tessellation performance is obvious in this game: the Radeon HD 6870 even beats the Radeon HD 5870 in terms of bottom speed at 1600x900. On the other hand, its 22 fps is only a miracle compared to the Radeon HD 5850 but not to the GeForce GTX 460 768MB which easily delivers the same speed. The 1GB version of the latter card maintains a bottom speed of nearly 30 fps, which is unachievable with the Radeon HD 6800 series.
Performance in RPGs
Mass Effect 2
We enforced full-screen antialiasing using the method described in our special Mass Effect 2 review.
Each Radeon HD 6800 card boasts impressive performance, especially at 2560x1600 where they are the only cards besides the more expensive ($259) and hotter GeForce GTX 470 to deliver a playable bottom speed. The Radeon HD 5800 series is slower despite its superiority to the Radeon HD 6800 in a number of technical parameters. They cannot always keep the frame rate above 25 fps.