Well the xbox itself has a GeeForce 3 card and if i'm guessing right it's a fully supported directx8 card and the xbox is built around direcx8 standards?
So my point is that any card that is newer than the GeeForce3 can manage to emulate the xboxs hardware.
The pixel and vertex shaders is a common standard, i mean like the gf3 has(guessing) version 1.2 or something like this (vertex and pixel shaders versions).
A newer card like GeeForce FX has pixel and vertex shader version 2.0 ++ or something, and Ati cards above 8500 have shaders 1.2+ and 9500 and up series has 2.0 shaders if i'm not wrong!
So in theory Splinter Cell should run just as good on your ATI cards as it will on the Nvidia basis cards.
I also read Caustik was making his emulator on a Radeon 7000 :P if he is there would be no problems runnig the emulator with your ati cards, cuz they all use the same drivers (catalyst).
G_G;; cucuuc
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