3DMark06 simulates DirectX 9.0c (Shader 3.0) games and it also puts HDR (High Dynamic Range) into the equation to calculate its final score. So it simulates the most high-end games available today. Since we were comparing mid-range cards, we ran this program in two resolutions, one low (1024x768) and one high (1600x1200). The results you check below. All video cards listed below were running with the default clock rates defined by the chip manufacturer.

3DMark06 Professional Edition 1.10 - 1024x768	Score	Difference
GeForce 8600 GTS 256 MB (MSI)	7002	15.74%
Radeon X1950 Pro 256 MB (PowerColor)	6198	2.45%
Radeon HD 2600 XT 256 MB (AMD)	6050
GeForce 8600 GT 256 MB (MSI)	5743	5.35%
Radeon X1650 XT 256 MB (HIS)	4292	40.96%
Radeon HD 2600 Pro 256 MB (AMD)	4194	44.25%
GeForce 7600 GT 256 MB (XFX)	4192	44.32%
Radeon X1650 Pro 256 MB (HIS)	3369	79.58%
Radeon X1600 XT 256 MB (HIS)	3295	83.61%
GeForce 8500 GT 256 MB (MSI)	2927	106.70%
Radeon X1300 XT 256 MB GDDR3 (HIS)	2860	111.54%
Radeon HD 2400 XT 128 MB (AMD)	2800	116.07%
GeForce 7600 GS 256 MB (XFX)	2763	118.96%
GeForce 6600 GT 128 MB (NVIDIA)	2213	173.38%
GeForce 7300 GT 256 MB (Zogis)	2046	195.70%
Radeon X1300 Pro 256 MB (ATI)	1920	215.10%
GeForce 6600 128 MB (Albatron)	1357	345.84%
GeForce 6200 128-bit 128 MB (Leadtek)	741	716.46%

3DMark06 Professional Edition 1.10 - 1600x1200	Score	Difference
GeForce 8600 GTS 256 MB (MSI)	4607	14.35%
Radeon X1950 Pro 256 MB (PowerColor)	4496	11.59%
Radeon HD 2600 XT 256 MB (AMD)	4029
GeForce 8600 GT 256 MB (MSI)	3707	8.69%
Radeon X1650 XT 256 MB (HIS)	2923	37.84%
GeForce 7600 GT 256 MB (XFX)	2765	45.71%
Radeon HD 2600 Pro 256 MB (AMD)	2738	47.15%
Radeon X1650 Pro 256 MB (HIS)	2117	90.32%
Radeon X1600 XT 256 MB (HIS)	2086	93.14%
GeForce 7600 GS 256 MB (XFX)	1796	124.33%
GeForce 8500 GT 256 MB (MSI)	1784	125.84%
Radeon X1300 XT 256 MB GDDR3 (HIS)	1781	126.22%
Radeon HD 2400 XT 128 MB (AMD)	1681	139.68%
GeForce 7300 GT 256 MB (Zogis)	1281	214.52%
Radeon X1300 Pro 256 MB (ATI)	1100	266.27%