Are you going to use it for architectural purposes?In statics, you won't see any significant difference except for very large projects (like 30+ floors), whereas in architecture, quadro may be a bit faster depending on the density of furnishing/tree libraries/land modeling used. In our tests, quadro 4000 offered a smoother operation than gtx 660. However, we did not test the program with quadro 2000. On the other hand, you can consider an ATI card (7770 and higher) instead of gtx 660, unfortunately nVidia GTX6.. series prevents CAD use. It artificially slowed down the features of the game cards used by CAD programs to pass and sell quadro.