The UM790 is pretty quiet under normal use, but has about a +7dB wooshing when maxed out (not too annoying, but definitely noticeable - it's a bit quieter than my Framework laptop under stress testing). Notebookcheck has a full review and has measured noise emissions: https://www.notebookcheck.net/Minisforum-Venus-Series-UM790-...
I've been using this as my home workstation for the past month or so and have been keeping my own notes. The biggest caveat is that there are stability problems (mine and others seem to be lockups w/ C6 on Ryzen, there are others where lowering RAM speed (from 5600 to 4800 or 4000) clear things up, and for some people, it's with multiple monitors plugged in). There was a recent BIOS upgrade that updated AMD's AGESA and GOP but that doesn't seem to have helped much.
I've been using this as my home workstation for the past month or so and have been keeping my own notes. The biggest caveat is that there are stability problems (mine and others seem to be lockups w/ C6 on Ryzen, there are others where lowering RAM speed (from 5600 to 4800 or 4000) clear things up, and for some people, it's with multiple monitors plugged in). There was a recent BIOS upgrade that updated AMD's AGESA and GOP but that doesn't seem to have helped much.
* https://github.com/lhl/linuxlaptops/wiki/Minisforum-UM790-Pr...
* https://bbs.minisforum.com/forums/ryzen%E2%84%A2-9-7940hs.19...