So there is common situation when the boot is going, then you see HIVE message in console and then the screen is going black.
The reason for this is failing to start X server. It's a linux graphical user interface.
Make sure you have connected your monitor to the external GPU in 16x slot. This might be the main reason. Sometimes internal GPU will work but in some cases there is a driver conflict and monitor is not detected properly.
X server just fails itself. Examine it's log with "journalcrl -u hivex". But you will need network access for this.
Give up and try to connect with VNC. If it's working then X server is running and you see it. And your Nvidia OC will work also. My point is that you need monitor only at first boots and then it's easier work on network.
In rare cases there is really a system problem and it's not solved with software in any way.