@arcanicanis Holy shit, was this on a 1st gen Ryzen processor, by chance? I bought one off eBay and had similar issues in a B350 chipset board until I disabled C-States! I think there was a bad run of early first gen 1700s.

In another hilarious coincidence, I also had ZFS arrays hooked up to that thing when it started failing. It survived as well, but I was really sweating when I started getting drives dropping out of arrays due to write errors because of segfaults.