Well, both the Athlon 850 and Pentium 3 850 were launched in 2000, so they're not really 1999 CPUs.
You could argue that 850 MHz was doable in 1999 through overclocking, though.
As others have pointed out, whoever has a GeForce 256 DDR will have a real advantage in this competition (yes, even if you tweak the shit out of the game, it will be a lot harder for other 1999 cards - like a TNT2 Pro - to beat a GeForce 256 DDR + a semi-tweaked game).
My recommendation would be to also allow at least something like a GeForce 2 MX/MX400 (especially since the CPUs, again, are not really 1999 material). Those cards are readily available, so a lot more people could participate (which will make things more interesting).
Anyway, even though I have all the parts, I only benchmark untweaked games, so won't take part in this competition (+ I have way too many Voodoo 3 cards already).
But, I will keep an eye on it to see who wins (hopefully you will allow the MX/MX400 cards, which will mean that even non-collectors will have a chance of winning the Voodoo). Good luck to all! 😀
2 x PLCC-68 / 4 x PGA132 / 5 x Skt 3 / 1 x Skt 4 / 9 x Skt 7 / 12 x SS7 / 1 x Skt 8 / 14 x Slot 1 / 6 x Slot A
5 x Skt 370 / 8 x Skt A / 2 x Skt 478 / 2 x Skt 754 / 3 x Skt 939 / 7 x LGA775 / 1 x LGA1155
Current PC: Ryzen 7 9800X3D
Backup: Ryzen 7 5800X3D