AMD Radeon HD 4890 On Linux
While Warsow is an open-source game that uses the Qfusion engine, the benefits of the Radeon HD 4890 are clear when running this first person shooter at 2560 x 1600. The Radeon HD 4870 was about 20% faster than the Radeon HD 4850, while the Radeon HD 4890 is about 15% faster on top of the Radeon HD 4870. There is no need to run a game at over 550 frames per second when running at 2560 x 1600, but the Radeon HD 4890 does not cost much more than the price of the Radeon HD 4870.
With World of Padman, which uses the ioquake3 engine, the Radeon HD 4890 came out on top. It was not much faster than the RV770 graphics cards, but that is to be expected considering World of Padman is not that demanding on the graphics processor.