Hi Billa, do you see any difference if in MoI you go to Options > General > "Edit .ini file" button and then inside moi.ini set:

GraphicsAPI=OpenGL

that setting can be one of: Auto, OpenGL, or Direct3D11.

Another thing you might fiddle with in moi.ini is to set:
StaticBufferMaxVRAMToUseMB=0

That will effectively disable the VRAM caching mechanism and only stream data to t he card like v3 did.

- Michael