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I don't know if I'd recommend the TNT2. Nvidia already dropped support in their drivers for the original TNT. >>
I'm not sure where you heard that but it's entirely false. The original nVidia Riva TNT is still 100% fully supported by nVidia under all Windows 9X and NT core operating systems as well as Linux.
Even the latest DetonatorXP drivers are 100% compatible with the TNT.
For confirmation you can look in the .inf for the latest DetXP's if you wish therein you will find the supported graphics chipsets among them the TNT1.
Additionally here is a link to the supported chipsets for the latest DetonatorXP drivers under Windows 2000.
Linky
Among which, is listed the TNT1.
The TNT2 is little more then a die shrunk higher clocked and slightly modified TNT core, if nVidia was to drop support for the TNT1 they would need to drop[ support for the TNT2 also, as they are both based around the same core architecture, the TNT2 just being an improved TNT.