Rhino 6 Speed

I’ve been testing the evaluation copy of Rhino 6 and I’ve noticed that it’s much slower than Rhino 5 when panning about in shaded or rendered mode. I’m not complaining about that It also looks much better. My question is what’s your best bang for the buck in terms of hardware upgrades? I assume it’s the video card. I just wanted to plan my upgrades accordingly.

https://discourse.mcneel.com/c/rhino-for-windows/hardware