You have no swap.
With 16gb thats probably fine most of the time … but I might suggest adding something or other. zram is usually my suggestion.
But this is unlikely to be the cause of your problems.
Oh … maybe it is swap.
After you run out of your physical memory the system is expected to lock up.
To see a quick zram suggestion click here
Your BIOS is also very out of date, especially considering some of the relatively newish components.
If my search is correct