Call of Duty 4 is a DirectX 9 game implementing high-dynamic range (HDR) and its own physics engine, which is used to calculate how objects interact (for example, if you shoot what exactly will happen to the object when the bullet hits it – Will it break? Will it move? Will the bullet bounce back?), giving a more realistic experience to the user.

We ran this game under three 16:10 widescreen resolutions, 1680x1050, 1920x1200 and 2560x1600, maxing out all image quality controls (i.e. everything was put on their maximum values on the Graphics and Texture menus). We used the game internal benchmarking feature, running a demo provided by nVidia called wetwork. We are putting this demo for downloading here if you want to run your own benchmarking. We updated the game to version 1.6.

Call of Duty 4 - 1680x1050 - Maximum	Score	Difference
GeForce 9800 GX2	106.2	46.69%
GeForce GTX 280	105.3	45.44%
Sapphire Atomic Radeon HD 3870 X2	75.7	4.56%
Sapphire Radeon HD 4850	72.4
GeForce 9800 GTX	69.1	4.78%
Radeon HD 3870	43.0	68.37%

Call of Duty 4 - 1920x1200 - Maximum	Score	Difference
GeForce 9800 GX2	94.5	59.90%
GeForce GTX 280	91.7	55.16%
Sapphire Atomic Radeon HD 3870 X2	61.3	3.72%
Sapphire Radeon HD 4850	59.1
GeForce 9800 GTX	57.7	2.43%
Radeon HD 3870	35.4	66.95%

Call of Duty 4 - 2560x1600 - Maximum	Score	Difference
GeForce 9800 GX2	64.8	76.57%
GeForce GTX 280	64.8	76.57%
Sapphire Atomic Radeon HD 3870 X2	40.6	10.63%
GeForce 9800 GTX	38.3	4.36%
Sapphire Radeon HD 4850	36.7
Radeon HD 3870	22.4	63.84%