My observations of this new GPU and it's performance with Archicad.
Firstly, it's quite inexpensive for a pro card!
This card is intended to be a crossover card, but mainly aimed at software like Archicad.
In windows it's fantastic. Very fluid and responsive, the 16Gb of fast HBM memory has no trouble with even very big models in the 3D window.
In Mac OS x it's a bit jerky. It only runs in High Sierra, which has native drivers for this card.
I think the drivers are still a bit unfinished because the window in both 2D and 3D are a tiny bit jerky. There have been a few GPU crashes when doing some complicated operations on big models in the 3D window.
Overall, highly recommended, particularly for windows.