I'd say it will most likely perform just as well as other TNT2U cards. I have an Aopen PA3000 Vanta card that runs pretty well. Has just a heatsink and will overclock to around 115/158 and runs AGP 4X no problems...Of course it pales in comparison to the GF2 GTS in my primary box...but big price difference
Vanta cost me s/h of 2 older 8 meggers

GF2 GTS was around $140 USD shipped
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Sys #1: Soyo 6BA+100, 800E@976, 32MB Elsa Gladiac GF2 GTS, 128MB KingMax PC150, 15.3GB DiamondMax +40
Sys #2: Tyan s1854, 500E@700, 16MB TNT2 Vanta AGP, 128MB PC100@140, 2 x 3GB ATA33 HDDs