I must send back the mainboard (Gigabyte X570 xtreme). It has a little sound scratching in idle and coil whining under full load (VRMs). For this price this is not acceptable and I have never seen this from a mainboard. It also had a very old BIOS and didnt let me install windows from USB (Bluescreens every time), bugged. At first I flashed the BIOS (F11) and all was good so far. Without a second computer you have no chance to setup.

For the ryzen 3950x test I have used llr -t16 (16 cores @59°C FFT640) and pfgw (1 core each up to 16 @70-80°C) with the Noctua NH-U14S (<1000rpm, the cooler was bigger than expected but compatible with the board/RAM) - BIOS settings SMT (HT) disabled. The videocard in idle has 0rpm.

Now I need to fill out RMA and hope the second board will be better.

The 2nd mainboard and the ASUS ROG Crosshair VIII Hero Gaming have the same issues with coil whining, I have found a solution to reduce it a bit, will build the rest later this week, still need a new monitor because mine is very old and has no HDMI / DP connections. This can take a while to setup all the things I need and test it with the BOINC VM (current estimated time 1 month). The current main issue is the windows 10 automatic restart after update, I found a software but still need to be tested. Why its not possible anymore to tell windows when I want to install / download updates manually. Stupid MS.

I think the tool is better with one click.

https://www.deskmodder.de/blog/2018/11/21/wumgr-als-app-im-microsoft-store-fuer-windows-10-updates-manuell-installieren/

The page is in German but you can find the program in win10 store.

current update:
The coil whining was only on the llr -t16 test, BOINC under full load was ok, one more test is needed for pfgw. The setup is still without the case. Missing programs need to be installed too and waiting for a new bigger monitor.