if this is happening in most or all of your drawing including simple projects. I'd suggest recovering or recreating your drawing template. Any errors in the template will be passed along to the drawings.
Also check to see if you have the latest drivers for your graphics card.
Updating RAM always is a good idea.
I don't know if you operate on a network. But network transfer speeds can cause problems as well.
I'd go with the latest version of Civil 3D, 2021.2. It's more likely that will fix issues than cause them.
Allen Jessup
CAD Manager - Designer
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.
I have run C3D on $10k pc's (xeons, dual quadros, 64bg ram) and $800 laptops (dual core amd, geforce 16 mb ram) with very little difference or in performance. With the newer versions I think processor speed, memory and fast network connections (if you working on a network or with internet resources) are the biggest factors. I run C3D on high end quadro and low end geforce cards with similar results.
Data management is the best way to control performance. All machines I have used have locked up at times with very large datasets. Sometimes simply selecting a fline with thousands of vertices or a very large and dense surface can lock it up. Even a trim command on a dense fline can do this.
Minimize data. Use dref and xref's. One task on file. Do not put everything in one file. Review the Civil 3D Best Practices Guide, Data Management section for detail on how to organize a C3D project.
John Mayo
Are you using grading objects?
If so, they are allways toxic often finicky. Save often, Purge, Audit -Purge R * N
Some days multiple crashes are the norm. Some days not.
Christopher Stevens
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.
I've been working with Civil3D for about 4 years and find it quite stable on Points, Parcels, Surfaces, Alignments, Profiles and Sections. Of course slow is not the same thing as stable. I've always found it slow (even on a high end machine). Adding physical RAM is the best recommendation (as someone else mentioned). I noticed a slight improvement in large surfaces when I went from 32 to 96gb recently.
DotSoft: The Leading DeveloperNo xrefs?
general rule one take one file. Xrefs and drefs are strongly encouraged to reduce the load on your pc.
If I did a subdivision in a file that gets xrefed into a new file for road design. A new file for lot grading xrefing in the subdivision and drefing the road grading. New file for sheets xrefing and drefing all this data. This is a general roadmap to keep your files performing best. If all of these C3D objects (parcels, road corridors, lot grading) it is way too much IME.
John Mayo
@cwr-pae wrote:One slow down in all memory intensive programs/operations is the use of paged memory on disk (I forget what MS calls it), faster disk equals faster overall performance. A super fast solid state disk seems to improve everything even with less than maximum physical memory installed.
It's called paging or swapping. The Swap File is pagefile.sys. If you open the Windows Task Manager on the details tab. You can add Page Faults and PF Delta columns. I use those to keep track of what is really eating memory. If you sort by PF Delta. If doing anything in Civil 3D. acad.exe will almost always be on top.
If you can get everything; Program, Drawings and pagefile.sys on an NVMe cards. That will give the best performance.
Allen Jessup
CAD Manager - Designer
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.