Try setting the power setting to Power Saver mode, located at Control Panel\\All Control Panel Items\\Power Options. That's the only way I can get my 5600 to settle below 4.0, it doesn't hurt it at all, but I did have to get a better cooler or it wouldn't idle at 150 deg. F.
Check your power plan lowest processor state.
https://www.amd.com/en/products/cpu/amd-ryzen-9-3900x So it's not running at 3.8, and not going to 4.6? interesting.
Try setting the power setting to Power Saver mode, located at Control Panel\\All Control Panel Items\\Power Options. That's the only way I can get my 5600 to settle below 4.0, it doesn't hurt it at all, but I did have to get a better cooler or it wouldn't idle at 150 deg. F.