Hmm! Very strange! I probably don’t have the same setup as you at all, but I’ve only had the system entirely freeze on me when I’ve run out of memory (compiling big projects that takes like 60 gigs of memory, ugh). Enabling zram completely solved this problem for me (the memory compresses super well in my use case). 16gb is a decent chunk of memory and I wouldn’t expect you to run out in normal circumstances, though. If you’re doing some heavier work on your computer it could be tight.

What kind of system are you running? I probably can’t help, but maybe somebody else would have an idea. Any clue when it freezes? Like a certain application or something?