I rember that i read some actual test of G400 and we bought Matrox G4000 and returned it quickly because of bad games compatibility maybe later, compatibility was better.
For 640x480-1024x768 i think is still best to use Voodoo 3, if need more if need more modern cards. Im using Radeon X8xx for 1600x1200 gaming, i had time only play only few major titles on Win98, not something especially not mainstream, or problematic from GPU compatibility as far, i remember..
I think that we need some modern machine testing matrix, because there are lots of claims and its hard to verify them.
We dont need zillions games or cards to test, we just need to select good game list with good mix blockbusters and problematic games (i think that 20 games with 10 from each category could be enough).. and well will maybe need to test zillions of Nvidia drivers versions 🙁
Im old goal oriented goatman, i care about facts and freedom, not about egos+prejudices. Hoarding=sickness. If you want respect, gain it by your behavior. I hate stupid SW limits, SW=virtual world, everything should be possible if you have enough raw HW.