maybe b/c its so late I am misreading the question, but no video card will get rid of jaggies in your rendering. That has to be corrected with carrara's engine code. the polies that carrara generates are generated with a code base, not a graphics API like opengl or direct3d...other wise your picture would look different between every video card. The cards will help you in the assemble room...the realtime polies and lighting all take advantage of the opengl and d3d api's....but your final picture is a mathatical render that has nothing to do with the hardware on your computer.