The driver for NVIDIA 560 GTX does have a problem as I suspected.  According to this thread, a new driver will be out in a few weeks http://forums.sketchucation.com/viewtopic.php?f=11&p=362959.  If that is not soon enough, try older drivers.

 

The 560 GTX seems to be pushed as a gaming card.  Games require less from OpenGL than SU - which creates new geometry with real-time rendering instead of just rendering existing geometry.

 

BTY, Quadros aren't needed for SU - just very good OpenGL support in the driver.