elod wrote:Geforce would be the most compatible.
Compatible with what? All those cards will work fine in most super 7 motherboards.
F2bnp wrote:Every card other than the G200 will be bottlenecked by the K6-2. It really is kind of a toss-up after this, my suggestion is to find the one that runs the most stable on this platform, as the early non-Intel AGP chipsets were quite troublesome.
Phil had a great comparison of different cards on his channel, you might want to check it out, it contains several parts:
https://www.youtube.com/watch?v=0gipW4lcUHg&feature=youtu.be
The G450 roughly equals a TNT2. A TNT2 is not bottlenecked by a K6-2. As for Phil's videos - while very well put together and entertaining to watch, his research and test methodology is sometimes superficial so I'd take some of the information with a grain of salt.
My first instinct would be to try either the G450 and the Radeon 7000, with the GF4 MX as a backup. The issue here is 3dnow support. Forceware drivers support 3dnow!, and so do ATi's catalyst 4.2 drivers (earlier drivers probably support 3dnow as well, but i haven't experimented with the). No idea about matrox drivers.
Another thing - the radeon 7000 is often a crippled radeon DDR with a 64 bit memory interface. It's usually really slow.
Part of the fun with retro hardware is figuring this sort of things out for yourself.