The NV17 (GF4 MX) is a DirectX7 part.
It has limited vertex shader capabilities, it has the GF2's T&L engine, the 'crossbar' memory architecture of the GF3.
Only two pixel pipelines and the associated 2 texels/pipeline rather then the 4 that the GF2 (non-MX), GF3, and GF4 has.
It does support the GF3's 'Quincunx' FSAA implementation, along with the GF1/2's 2X and 4X SuperSampled FSAA implementation.
Think of it as a cross between the GF2 MX and the GF3.