As oussebon said, try a cmos reset. If you have a CPU/RAM overclock that could be causing it.
But if you are getting the same issues with everything set to defaults, then the board is either damaged or dying.
I had a somewhat similar issue with my Asus X370 Crosshair VI Hero, in BIOS I would get very rare stuttering going thru the menus, this is very weird because BIOS's should be the most stable part of a system, and never have any stutter or any graphical glitching whatsoever.
Soon after, my board starting dying relatively quickly.