3DMark is a widely used and accepted benchmark that stresses the DirectX performance of a VGA card. For testing the performance of each card we use the 4 game benchmark 3DMark offers. The first is a DirectX 7 game, the second and the third use DirectX 8 and the last one stresses graphics in DirectX 9. A very strong point of 3DMark is that its VGA card measuring does not require a lot of CPU power. So the resulting fps are a good reference of a VGA card's rendering performance.
A marked improvement for the P4 3.7GHz over the P4 660, but not as good as the AMD processor.