C3D - available processing power

[geo_weber]

Why doesn't CIVLI 3D take advantage of my PC's available processing power? I am dealing with constant freezing of the program while working. The calculation of the ground solid itself (geometrically very simple) took about 12h. Subsequent work (e.g. modification of the designed solid level is not possible, etc.). The "switch" between the drawing and model environment itself takes a minute. The program uses a maximum of 20% of CPU power, 25% of memory and units of percent of GPU.
Drivers are up to date and hardware acceleration is active.

Please explain or suggest optimization. Thanks

PC:

Processor: Intel Core i7-12800
Memory: 64 GB DDR5
Graphics card: NVIDIA RTX A1000 4GB GDDR6
Disk: SSD 1TB

Project:
13 hectares
Surface: created from a DEM (pixel 0.5mx0.5m)
Ground body: plane with a slope of 1:2

[v-silvestre · Accepted solution]

When I first got my work pc, I had to make the following changes within the Nvidia Control Panel and I'm curious what you have set:

Also, in Windows you can have C3D set to always use a specific graphics card under System > Display > Graphics

From Options you can choose the graphics card:

Also, one last thing to try is the WHIPTHREAD system variable, .  I'm not sure how much (if any) it helps, but it's worth a shot:  WHIPTHREAD = 1

[brian.strandberg · Accepted solution]

Those graphics changes do make a big difference.  

The important thing to keep in mind when selecting a computer to run CAD, is that most CAD applications are primarily single threaded.  This is because the CAD file is essentially a database, and the order changes are read and applied is important.  This means if you have a 16 core CPU, AutoCAD will be using one. 

Back to selecting a computer, with the # of cores being not relevant, you want the fastest single threaded cpu you can get.  I usually refer to this chart: https://www.cpubenchmark.net/singleThread.html  Its not difinitive, but it is a good indication of r...

Now the good thing about CAD being single threaded, there is nothing stopping you from running more than 1 at a time.  I can have one session of CAD editing a file while another session is plotting a large sheet set.  No major performance slowdown as long as you have enough system memory.