Since the system is completely freezing, this rather points to a cpu/mainboard issue. Google gave me a hint this isn’t exactly uncommon owith 3X00 cpus but the solution is unclear, some solved it by
- setting a fixed cpu clock multiplier instead of auto
- disabling csm in bios and reinstalling in efi mode
- disabling c-states in bios
Of course, all overcllocking settings should be disabled, for cpu and memory.
Since the system is completely freezing it can’t log anything so it’s a guessing game, unfortunately.