Using latest ISO, booted to live env, let Calamares install alongside Windows, chose gnome, let the installer download and install packages, and rebooted when prompted. On boot, I get to the boot manager and select EOS, then just a couple lines appear briefly, then screen goes blank, then resumes with just a blinking underscore in the upper left corner, with no activity.
5600x, 6800XT, 16GB RAM, NVME drive.
can you reach cli login prompt by pressing [Ctrl+alt+F3] ?
Did you disable secure boot and csm in bios?
secure boot and csm are disabled.
edit: somehow secure boot was enabled afterall, I thought I disabled it. Toggling it to disabled doesn’t fix the issue unfortunately
ctrl+alt+f2 followed by ctrl+alt+f1 allows me to get into the desktop, but this issue persists after reboot 
IF you haven’t done any changes, and now secure boot is off, I woud suggest just taking the 12 or so minutes and do a reinstall. Seems easiest, to be honest.
Sure, I will try later on today and report back
sounds like the common “systemd vs. graphic driver” issue. here you will find some solutions:
https://wiki.archlinux.org/index.php/GDM#GDM_shows_black_screen_with_blinking_white_cursor
I think this is it.
Reinstalling after making sure secure boot was disabled - still same problem. Will use link above, thank you