Reseat CPU and RAM, clear all BIOS settings to factory defaults, update BIOS (if there is any new BIOS available) should be steps that you hopefully have already performed?

Also make sure that if you have chipset drivers installed that they’re the newest version possible.

If things are stable, then you can start looking at running at XMP speeds and otherwise overclocking/undervolting/w.e.

Cheers!

Would you care to share the name of that addon? Sounds pretty handy