I think about to buy a K4000 3GB and ask me, how much could be the improvement over my GTX 285. The test would be quite simple - open the bike model -> enable shaded display mode -> _testmaxspeed.
My GTX285 needs approx. 28s for this test (if I turn advanced GPU lighting off 20s ). A Quadro 4000 needs approx. 15s. I’m curious for the K4000. If somebody like, he could disable the advanced GPU lighting off too.