About a month ago, I did a full teardown of my server, including reapplying thermal paste and thoroughly cleaning all its components. I have a 3700x and after doing this the temps averaged between 40c-50c depending on the load. Also just to note this was on 6.12.1.

During this time, I noticed that my 1TB NVMe SSD was reaching temperatures of 46-48°C without a heatsink, leading to frequent notifications. To address this issue, I decided to invest in a heatsink for the NVMe SSD. Additionally, I purchased two 2TB SATA SSDs with the intention of experimenting with ZFS pools. I don't know much about ZFS but have heard positive things about it and wanted to give it a try.

Yesterday, I installed the new drives, updated the Unraid OS to version 6.12.3, and set up a RAIDZ pool. To optimize performance, I moved all my appdata and Nextcloud data onto the cache. Following Spaceinvaderone's guide, I converted appdata to a dataset without compression. After verifying that everything seemed in order, I reactivated Docker and started up around 40 containers.

The CPU temperature spiked significantly this time, reaching 95-99°C, which I attributed to launching multiple containers simultaneously. However, even during idle periods, the CPU temperature remains at a concerning 80°C-90°C. I use glances to see what could be causing it but none of the containers are using much resources to begin with.

I assume it has to do with zfs in some way but have no idea how to approach this and get the temps back down now. Any help would be appreciated!

Here is everything in the server. Also attached diagnostics.
 

unluckyserver-diagnostics-20230720-1217.zip

19 minutes ago, UnluckyTech said:

The CPU temperature spiked significantly this time, reaching 95-99°C, which I attributed to launching multiple containers simultaneously. However, even during idle periods, the CPU temperature remains at a concerning 80°C-90°C

You likely have a cooling problem, like a fan issue, or the cooler not making good contact, or the temps are being reported incorrectly.

35 minutes ago, JorgeB said:

You likely have a cooling problem, like a fan issue, or the cooler not making good contact, or the temps are being reported incorrectly.

Honestly, I kept convincing myself for whatever reason that it wasnt a fan issue but once you pointed it out, I took another look. The cpu fan wasnt spinning. Guess one of the wires was caught in it making it not move. Greatly appreciate it.