Vertex Shader Performance
The GeForce 6600 GT is even faster than the GeForce 6800 GT in 640x480 due to the higher clock rate of its vertex processors. In higher resolutions it is the memory bandwidth rather than the geometry processing speed that determines the result. Clearly, this test suits but badly for evaluating vertex performance of modern graphics cards.
It’s different in an analogous test from the 3DMark03 suite: the speed of executing vertex shaders almost alone determines the end result. With 3 vertex pipelines against 6, but with a higher core clock rate, the GeForce 6600 GT is slightly faster than half the speed of the GeForce 6800 GT.