Basically you want to have a Quadro AGP card, but the good ones are quite expensive even for AGP and (correct me if I am wrong)since you still own an AGP based machine budget is a bit tight(not an insult), that's prob out of the question.
My advice to you is if you have an AGP card already just run along with that one save some money to buy a new rig which is PCI-e powered, if that's possible.
If you need an AGP card buy an NVidia game card that is AGP with reasonable specs not to high end and to high prized.
Even if you have the money don't be foolish don't invest in ancient technology which is dying out.
Yes you are wright money is short and if I could I would get another rig. I am still getting good result from my machine (see finished work) just would like to use the 3D paint tool witch needs a Nvidia quadro card or a ATI firefx card but with one?
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