Here was my first upgraded GPU. Nvidia RIVA TNT2 Vanta 64bit. This wasn't the big dog of it's day as there was a 164bit version too, however with its 32Mb vram and
Nvidia Riva TNT2 AGP Graphics Card - computer parts - by owner - electronics sale - craigslist
NVIDIA RIVA TNT2 PRO 32 MB AGP Video Graphics Card - Helia Beer Co