I don't know to solve yet. I thought I had fixed but apparently not yet.
First, it was freezing after 7-10 hours... then I used the AMD Driver cleanup tool (amdcleanuputility.exe) ( that removes all AMD drivers in safe mode). Then installed the latest version of the adrenaline drivers: non-whql-radeon-software-adrenalin-2020-21.2.1-win10-64bit-feb1.exe
After this, I left all defaults (changed nothing) and it worked for about 3-4 days (24/7), without any problems. Then it freezes again. There is no specific reproducibility procedure. I can do basically anything with the GPU, and when it freezes can be while I am doing nothing or while I am playing something or seeing a video. Totally random and I can't figure out why yet. Never blue screens or crashes the PC... only freezes.
I am back on the Intel GPU... waiting for new drivers to see if there is any news.
My setup:
CPU: Intel Core i5-8400, 3900 MHz
Motherboard: Asus TUF B360M-Plus Gaming (BIOS 05/27/2020)
RAM: 2x16 GB (Micron)
GPU: AMD Radeon RX 6800 XT (Shappire Nitro+, no BIOS available)
PSU: Corsair AX850
Monitor: Samsung LC49RG90SSEXXY (1004.0 Firmware)
Windows 10.0.19042
I keep reporting to AMD, but not sure if its helping.