It should be pretty good. It is almost the latest generation, it has enough VRAM, it is NVidia, which usually works very well with ARCHICAD.
I have a 460M, which is 5 generations older and it still works fine.
So a 960 should be pretty good for the next several years.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac28