3DMark06 measures Shader 3.0 (i.e., DirectX 9.0c) performance. We run this software under three 16:10 widescreen resolutions, 1680x1050, 1920x1200, and 2560x1600, first with no image quality enhancements enabled – results we call “low” on the charts and tables below –, then setting 4x anti-aliasing and 16x anisotropic filtering. See the results below.

3DMark06 Professional 1.1.0 - 1680x1050 - Low	Score	Difference
Sapphire Atomic Radeon HD 3870 X2	16260	37.31%
GeForce 9800 GX2	15623	31.93%
GeForce GTX 280	14904	25.86%
GeForce 9800 GTX	12759	7.74%
Sapphire Radeon HD 4850	11842
Radeon HD 3870	10694	10.73%

3DMark06 Professional 1.1.0 - 1920x1200 - Low	Score	Difference
GeForce 9800 GX2	15547	45.42%
Sapphire Atomic Radeon HD 3870 X2	15489	44.88%
GeForce GTX 280	14215	32.96%
GeForce 9800 GTX	11631	8.79%
Sapphire Radeon HD 4850	10691
Radeon HD 3870	9454	13.08%

3DMark06 Professional 1.1.0 - 2560x1600 - Low	Score	Difference
GeForce 9800 GX2	13015	61.14%
Sapphire Atomic Radeon HD 3870 X2	12315	52.47%
GeForce GTX 280	11766	45.67%
GeForce 9800 GTX	8743	8.25%
Sapphire Radeon HD 4850	8077
Radeon HD 3870	6823	18.38%

3DMark06 Professional 1.1.0 - 1680x1050 - High	Score	Difference
Sapphire Atomic Radeon HD 3870 X2	16260	83.09%
GeForce 9800 GX2	13900	56.51%
GeForce GTX 280	12157	36.89%
GeForce 9800 GTX	8981	1.13%
Sapphire Radeon HD 4850	8881
Radeon HD 3870	6915	28.43%

3DMark06 Professional 1.1.0 - 1920x1200 - High	Score	Difference
Sapphire Atomic Radeon HD 3870 X2	15489	94.29%
GeForce 9800 GX2	12213	53.20%
GeForce GTX 280	10991	37.87%
Sapphire Radeon HD 4850	7972
GeForce 9800 GTX	7811	2.06%
Radeon HD 3870	6114	30.39%

3DMark06 Professional 1.1.0 - 2560x1600 - High	Score	Difference
Sapphire Atomic Radeon HD 3870 X2	12315	108.87%
GeForce 9800 GX2	9829	66.71%
GeForce GTX 280	8704	47.63%
Sapphire Radeon HD 4850	5896
GeForce 9800 GTX	5774	2.11%
Radeon HD 3870	4319	36.51%