What are /r/ArchiCAD's favorite Products & Services?

From 3.5 billion Reddit comments

I use Rhino or Moi (http://moi3d.com/index.htm) to convert the STEP to .OBJ or other standard 3D file format. Then some massive geometry optimization in Cinema4D as STEPs are usually really heavy (hundred of millions of polygons). Then Import in Archicad.

Well, definitely download and test your PC with Cinebench then! (I've linked it above as well).
Archicad uses Cinerender engine to create renders, it's made by Maxon and Cinebench is their synthetic load test for PCs. It does use the same engine as well

There is a lot of solid info, I would like to add a few specific notes:
Go to your components manufacturers website, and download new drivers. Specifically check the

Motherboard and GPU manufacturers web

Check Archicad for updates

Check your CPU cooler is rated for the TDP your processor has (the stock cooler usually isn't good enough to run at consistent high load)

Test your hardware, you can use many free tools to look at the temperatures under load - to name a few, you can measure the temperatures with this and create the load with this - after googling you can get to ~5 tools for both for free.