MX4 is technically a modified GF2 GTS as MX2 is only a modified GF1. Both can be seen in the NVidia internal GPU declaration ( NVxx ).
And yes the GF number missuse is a quite bad joke, especially on GF4 MX ( GF2MX was no that large difference, restricted pipeline power but not more ) which has no shader and nothing. They should have called it GF2 MMX or MX2
P3 and P4 have VertexShader 1.0 support but 1.0 is totally restricted and nearly useless, especially as vertex shader that streams all the time from CPU to GPU is deadly slow in real use.
As far as I've heard and read so far, Shaders can't be emulated through software btw. Either hardware is able to perform it or you are out.
And yes the GF number missuse is a quite bad joke, especially on GF4 MX ( GF2MX was no that large difference, restricted pipeline power but not more ) which has no shader and nothing. They should have called it GF2 MMX or MX2
P3 and P4 have VertexShader 1.0 support but 1.0 is totally restricted and nearly useless, especially as vertex shader that streams all the time from CPU to GPU is deadly slow in real use.
As far as I've heard and read so far, Shaders can't be emulated through software btw. Either hardware is able to perform it or you are out.