Hello @anon96036739
I’m not sure what is causing your freeze. It could be the RX5700XT. I have the Ryzen 7 3800X with Radeon RX590 and no issues. I am wondering what some of your other hardware such as the motherboard? Are you able to post the following?
inxi - FGz
Edit: Do you have two separate power supply lines going to the video card?