Both cards passed during Graphisoft's testing for 15:
http://www.archicadwiki.com/VideoCardsForArchiCAD15
Seems worth saving the money with the 2000 to have more money for Artlantis, etc.
Note that at present, neither ArchiCAD nor Artlantis uses OpenCL (C not G) to accelerate rendering by using the graphics card processor itself. But, more and more software will come out that does so. (On the Mac side, Final Cut Pro X and more are already taking advantage of the graphics card to speed up rendering.)
Both cards support OpenCL, for when you have apps that can use it:
http://developer.nvidia.com/cuda-gpus
As you can see on the page above, the cheaper 2000 is twice as fast as the 4600 (for OpenCL operations).
For what its worth, I have a much cheaper ATI Radeon 5770 card and it's perfectly fine.
😉
Cheers,
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sonoma 14.7.1, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB