3D Mark 2001
Mad Onion's 3D Mark 2001 is a synthetic DirectX 8 benchmark. As such, it is filled with complex scenes, large textures, and high-polygon models. In theory, the extra memory could be a real advantage here.
So much for that theory! There are no differences between the cards in 3D Mark 2001. Not even the individual scores show any kind of variation that couldn't be explained by a margin of error.