I have a P4 CAD PC and an Athlon 2500+ PC, the Athlon 2500+ PC internet connected and both machines with AGP Geforce 6200 cards.
The P4 CAD machine's card died.
Only have a TNT2 card, Geforce 4 64mb card and an ATI 9200SE 128mb card spare, the ATI 9200SE being most high end for CAD work.
The ATI 9200SE 128mb card doesn't work with Athlons, hence have put it in the P4 and the working Geforce 6200 card in the Athlon PC.