I've been using the next simulator on the X3D JR Canyon scenery using helis(fpv window closed). I really like it as it feels real or different especially with the trees moving and the moving grass too.
But it is slightly choppy. Yes I have the Max settings and liking it. Currently have a 1080 and I was thinking if I get a GTX 1060 6GB to be a dedicated physx card would that be enough to make it smooth? Or should I go for the mid range gpu GTX 1070? Unity support Explicit Multi-Adapter like DX12 SFR?? May be SLI???
I think the faster the better, because I have some interesting sceneries in the pipeline. I would purchase the GTX 1060 6GB because it's much cheaper than the 1070.
I suggest to reduce the detail object density in the graphics settings to 20%.