The year after the TNT was the TNT2 (which was a great chipset).
Geforce didn't come out until Oct 1999 and even then it was only one chipset. The rest of the product range came the following quarter (2000).
I skipped that generation and jumped to the Geforce 2 (this time first party rather than a 3rd party card with nvidia GPU), which was also an awesome card.
As for the fall of 3dfx, I dont think the rise in popularity of DirectX and OpenGL helped their case as that really levelled the playing field. After that, specifically targeting Voodoo cards felt more like a chore than an enhancement.
I had an NV-branded GF3, which was sold or given to developers since they had some issues with supplying enough chips to OEMs. Looked like this:
http://www.ixbt.com/video/images/leadtek-tdh/geforce3-ref-fr... (and judging by the URL name it was made by Leadtek).
AFAIK, Nvidia have never fabricated their own cards, but they do design the reference boards that most OEMs use as a basis for their own cards, and they did at one point release cards directly under the Nvidia brand (the cards were fabricated by Foxconn using Nvidia's designs).
Geforce didn't come out until Oct 1999 and even then it was only one chipset. The rest of the product range came the following quarter (2000).
I skipped that generation and jumped to the Geforce 2 (this time first party rather than a 3rd party card with nvidia GPU), which was also an awesome card.
As for the fall of 3dfx, I dont think the rise in popularity of DirectX and OpenGL helped their case as that really levelled the playing field. After that, specifically targeting Voodoo cards felt more like a chore than an enhancement.