Hi MaLd0n,
I've followed the instruction and got the Big Sur running.. unfortunately there is no Video Signal on the Displayport on the RX590, only HDMI. Please asssit.
Here is the Send Me File:
https://drive.google.com/file/d/1Huvpxzp_gXeGHQ4JqPRrILjvTGModmew/view?usp=sharing