Go to GTX graphic board! believe me, Nvidia is the best driver for Cinema4D. I heard people crazy with Quadro driver. Freezing viewport, stacked Cinema4D and many other issues.
Well, for opengl Quadro works better, so if you use OpenGl and you want to spend enough money for Quadro use it.
However I prefer GTX as 3d software is not the only software I use, and GTX works better and costs less.
FOLLOW US