The Millennium P750's vertex shader scores look decent at lower resolutions, but scores tank when we crank things up to 1600x1200, where the card hits a fill rate bottleneck. The G550 only turns in a score here because DirectX is emulating a vertex shader in software. In theory, the software vertex shader should be quite fast our Athlon XP 2600+ test system, but the G550 doesn't have the pixel-pushing power to keep up.
In 3DMark03's more advanced vertex shader tests, the Millennium P750 is actually a hair faster than the GeForce FX 5200.
The Millennium P750 does quite well in 3DMark2001 SE's transform and lighting tests.