HardOCP has published an article about the performance and image quality of six popular graphics cards from NVIDIA and ATI in Call of Duty: World at War. You can check it out over here.
For this gameplay evaluation, we are using six video cards from AMD and NVIDIA. From AMD, we will look at a Radeon HD 4870 X2, a 1GB Radeon HD 4870, a 512MB Radeon HD 4870, and a 512MB Radeon HD 4850. From NVIDIA, we have a GeForce GTX 280, and a GeForce GTX 260. Please note that the 192-shader GeForce GTX 260 has been dropped from our evaluation procedure. The GeForce GTX 260 in this evaluation is the newer model with 216 shader cores. All video cards are operating at stock NVIDIA reference frequencies for this evaluation.
For 2560 x 1600 gamers HardOCP recommends the GeForce GTX 280, if you have a 1920 x 1200 display you should get the Radeon HD 4870 1GB and if you have a smaller display the Radeon HD 4850 would be a wise choice.