Dell Latitude 7480 / 7490 loud fan issue

We have a lot of Dell Latitude 7480 / 7490 laptops deployed.  When I first got them in we had lots of issues and complaints about the loud fan speed.  Under load this is understandable, but many times this would be with no load.   This is a common issue early on for these models as one can see from the numerous posts online:

https://www.dell.com/community/Latitude/fan-noise-and-heat-Dell-Latitude-7490/td-p/7439643

https://www.dell.com/community/Latitude/Dell-7480-and-Dell-5480-fan-noise-and-heating-issue-on-more-than/td-p/6072570

https://www.dell.com/community/Latitude/Latitude-7490-Overheating/td-p/6073431


In the past when I would get one of these laptops it was a matter of ensuring the BIOS was up to date and the issue would be gone.  Lately, my own laptop (7490) started having high pitch fast fan noise.  Of course I remembered right away that I had recently updated the BIOS to 1.13.1.
I quickly decided to do a BIOS downgrade to 1.11.0 to see if that would help.

No more loud fan noise at this point... Having issues with your fan always running top speed? Try an older BIOS version and call Dell rep to complain.

UPDATE:

I recently allowed a BIOS update to install and the issue came back on a Latitude 7490.

I then installed the Dell Power Manager application and found a section called "Thermal Management".  Under this section you can choose "Quiet", this instantly made the computer more bearable.