Serious Sam SE
With Serious Sam SE, I took the liberty of using the game's "Extreme Quality" add-on in an attempt to stress the AGP bus a little. Using this add-on means scores from different basic 3D chip architectures won't be comparable. For instance, the Radeon 9000 can't do anisotropic filtering with trilinear filtering, so its scores will be artificially high. The GF4 Ti 4200 cards are actually slower here because they are more capable.

So the main use of the scores below should be to compare AGP 8X with AGP 4X, and to see the effect of clock speed increases on a chip.

Well, I'll let you draw your own conclusions there. Obviously, with "Extreme Quality" in action, Serious Sam SE doesn't benefit much from minor clock speed changes or a faster AGP bus.