Volcano Map - SM 3.0 vs. SM 2.0
The Volcano demo takes place mostly indoors, and uses a lot of per-pixel lighting. Unlike the Regulator and Research demos, Shader Model 3.0 drastically affected performance this time around...
Both the GeForce 6800 GT and the GeForce 6800 significantly benefited by using the Shader Model 3.0 path in with the Volcano Demo. Performance gains with this demo varied from about 9% to almost 30%. Once again, it's when AA and Aniso are enabled together that the largest gains are realized, but even when anti-aliasing and Anisotropic filtering were disabled the NVIDIA card's performance increased by a few frames per second at both resolutions.