I am having the same problem. My hardware is a little different (MSI MPG X570 Gaming Pro Carbon Wifi, 3900x and ASUS RX 5700 XT) but it’s the same symptom that I can’t get past the boot of the installer. I have tried the following OSes and failed to get it installed with any:
Manjaro KDE 18.04, 18.1.0-RC8
Arch 2019.01.01 and 2019.08.01
Ubuntu 18.04.2, 18.04.3 and 19.04
PopOS 18.04 and 19.04
Debian 9.9.0 and 10.0.0
I did see a post somewhere that mentioned FreeBSD 12 worked out of the box and it did successfully install for me as well.
I have updated the BIOS to the latest 7B93v124(Beta version) and tried the installations again to no avail.
The errors I get in almost all of the attempts is related to AHCI not recognized. Each installer tries to reset the controller but can’t see any SATA drives (apparently). I’m not clear on this though because as an example with some of the more verbose installers I could see the drives listed but still got the error.
I’m not a complete noob but my previous Linux installs have gone (maybe fortunately or unfortunately) pretty smooth.
I am thinking I may just have to wait until a different BIOS becomes available or start learning FreeBSD.
Just wanted to add my experience in case it helps and see if anyone has any advice.