The 3D Mark 2006 fill rate benchmark benefits from the greater clock frequencies of the Gainward 8800 GTS 320 MB. The benchmark performs better with the 320 MB card than with the 640 MB card, however, it is important to remember that the 320 MB card’s overclock is what gives it its lead in this test.

The two 8800 GTS cards perform nearly identically in the vertex shader tests. The picture changes in the pixel shader tests, and we see a slight performance advantage with the 320 MB 8800 GTS. Again, we strongly suspect this is a result of the overclock the 320 MB part has.

We ran the Shadermak 2.1 test full screen at a resolution of 2560x1600. The two GTS parts perform nearly identical to each other. As this test heavily focuses on the stream processors, memory barely makes a difference. Since both parts have stream processors that operate at the same frequency of 1.2 GHz, their performance ends up pretty much the same.