Hi, I use a mac mini 2018 intel i7 and 16 gb of ram and 250 gb of ssd, intel 630 video card, as I use a Revit Autodesk 3d modeling software on windows 10 installed on Parallels 17, I would like to increase the performance because it is a little bit slow and not very fluid in moving 3d objects, and I wanted to know if adding an external video card solves the problem, or should I just increase the ram of the pc? Thanks