1280x800 & 1680x1050 Performance
Fortunately for gamers with low-end hardware, Brink runs very well at 1280x800. Although the Radeon HD 6570 averaged just 38fps, the 6750 was much faster with 57fps, roughly matching the GeForce GTX 450.
The Radeon HD 6770 -- which is a rebadged 5770 -- averaged a very playable 67fps, as did the GeForce GTX 550 Ti. All graphics cards north of the GTX 550 Ti scored more than 80fps with many cracking triple digits.
Brink becomes more challenging for low and mid-range cards when running at 1680x1050. For us, 30fps feels too laggy, especially when playing a fast-paced shooter, so we found the HD 6750 and GTS 450 a tad slow here with just over 30fps on average.
The HD 6670 and 6570 fell below the 30fps threshold, making the game much less enjoyable at this resolution. The HD 6770 and GTX 550 Ti almost managed to average 40fps while the 6790 and GTX 460 averaged around 50fps -- less than ideal in our book but passable nonetheless.
Although the Radeon HD 6850 and 5830 fell a hair short of 60fps, they should provide perfectly playable performance at this resolution. Any card above the HD 6850 should pump more than enough frames to play Brink comfortably at a resolution of 1680x1050.
The GTX 570 and HD 6950 delivered very similar performance, as did the GTX 580 and Radeon HD 6970.