Originally Posted by krokodil
Nevertheless, I'll try to get a cheap Quadro for home to test if there is any difference with and without this cable.
Follow-up: it seems the low end Quadro cards don't come with this 3 pin connector. I've found them only on the 5000 and 6000. So this cable does not seem necessary as even the low end Quadros (400, 600) support 3D vision.