Latest Rhino 8 runs at 0.01 FPS - unusably slow! Rhino 7 runs fine

Serengeti (Rhino WIP)
13

That NVIDIA Quadro P2000 is getting somewhat old but it should be fine to run that with OpenGL 4.6.

You could try a clean install of the GPU drivers or creating a Rhino scheme that doesn’t have any customizations to check if those have an impact.
-wim