Thanks Mark,

The one I have is a desktop Quadro - it is the Maxwell chipset of a new line on the nVidia workstation cards that has unfortunately used M in the name despite not being a notebook version. There is a Quadro M2000M and a M2000 - I have the latter. It is supposedly the replacement for the K2200 at the same price point. 

I'll attach my DxDiag along with a screenshot of the 3DCONFIG - I've made a support ticket through Autodesk as well - I'm really hoping it's a driver or settings issue as I will have to be working in this DWG for the next year