We upgraded Quake 4 to version 1.4.2 and ran its multiplayer demo id_perftest with SMP option enabled (which allows Quake 4 to recognize and use more than one CPU), under the same three 16:10 widescreen resolutions: 1680x1050, 1920x1200 and 2560x1600, first with image quality settings configured at “low” and then with image quality settings configured at “ultra”. You can check the results below, given in frames per second.

Quake 4 - 1680x1050 - Low	Score	Difference
Sapphire Atomic Radeon HD 3870 X2	285.30	6.14%
GeForce GTX 280	268.80
Radeon HD 3870	227.75	18.02%
GeForce 9800 GTX	225.52	19.19%
GeForce 9800 GX2	220.48	21.92%

Quake 4 - 1920x1200 - Low	Score	Difference
Sapphire Atomic Radeon HD 3870 X2	266.23	12.85%
GeForce GTX 280	235.92
Radeon HD 3870	188.40	25.22%
GeForce 9800 GX2	174.06	35.54%
GeForce 9800 GTX	158.87	48.50%

Quake 4 - 2560x1600 - Low	Score	Difference
Sapphire Atomic Radeon HD 3870 X2	197.82	17.18%
GeForce GTX 280	168.81
Radeon HD 3870	116.01	45.51%
GeForce 9800 GTX	114.34	47.64%
GeForce 9800 GX2	100.07	68.69%

Quake 4 - 1680x1050 - Ultra	Score	Difference
GeForce GTX 280	246.39
Sapphire Atomic Radeon HD 3870 X2	237.98	3.53%
GeForce 9800 GX2	218.80	12.61%
GeForce 9800 GTX	194.65	26.58%
Radeon HD 3870	167.26	47.31%

Quake 4 - 1920x1200 – Ultra	Score	Difference
GeForce GTX 280	224.44
Sapphire Atomic Radeon HD 3870 X2	218.62	2.66%
GeForce 9800 GX2	158.35	41.74%
GeForce 9800 GTX	158.18	41.89%
Radeon HD 3870	144.80	55.00%

Quake 4 - 2560x1600 – Ultra	Score	Difference
Sapphire Atomic Radeon HD 3870 X2	177.36	5.30%
GeForce GTX 280	168.43
GeForce 9800 GTX	102.04	65.06%
GeForce 9800 GX2	94.68	77.89%
Radeon HD 3870	94.40	78.42%