Millennium has no 3D, Mystique and Millennium II share the same 3D core and 2D acceleration enhancements. Millennium II has a higher freq and better quality DAC that Mystique. They are all great cards.

In-depth review: http://vintage3d.org/mga1.php#sthash.xqn0gt7l.dpbs

Millennium has no 3D

Millennium had 3D features. It was designed for CAD, so it can do Gouraud shading without texturing.

Millennium was supported by a single game only: NASCAR Racing. No Direct3D support, since it can't do texture mapping.

Millennium II and Mystique are quite equal feature-wise. However, Mystique was a consumer card with focus on games. About 10 games or so had direct support for the Mystique's 3D api. These games won't run on a Millennium II, which in turn was more focused to professional users and had many optimized drivers for CAD software.

Thank you, that's much better than what I find in wiki and vogon wiki and other places.

I remember while experimenting with Mystique and Millennium II years ago that I saw they have the same D3D rendering glitches/behaviors. So they do seem to be the same hardware for the most part.

They are also rather prone to lockups in 3D. Not all that uncommon for 3D cards of the time.

And I remember their drivers can cause static/stuttering problems for PCI sound cards. There is a system.ini tweak to disable some performance enhancements of their drivers to remedy this. Probably some Winbench score boosters that were so popular back then.

I remember the hardware accelerated version of NASCAR Racing won't run with the Millennium II. It wants the original Millennium.