Hi @Micha, In the new 340.66 Quadro Driver I noticed that there is a new Option at the bottom of the list.
There is the old Workstation App - Dynamic Streaming, but there is a new option called Workstation App - Advanced Streaming.
I am getting similar performance times as I did on the 3D App - Default Global Settings, and no noticeable delays on my Quadro6000. Perhaps try this new Nvidia Control Panel option.
I set mine to Advanced Streaming and then Set the Power Management to Prefer Maximum Performance again.
It seems to reset this back to Nvidia Controlled each time you change the option.
Edit: I’ve also noticed that Max Performance mode causes the GPU to run at top clock speed of 574Mhz (And top temperature) as long as Rhino3D is open. As soon as I close Rhino3D then the GPU gradually downclocks itself to 51Mhz in normal Windows Aero mode to save power and heat. Not a problem, but interesting that if you leave Rhino running(even minimised) the GPU does not downclock. Under Nvidia Controlled settings the clock speed would jump around between the 4 x power speeds contantly even with Rhino open.