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CPU temperature is 72°C, how can I find why? (lemmy.blahaj.zone)

submitted 3 months ago by [email protected] to c/[email protected]

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It's been a while since I noticed that but I can't find the reason. I selfhost :

a linkding with docker
a writefreely
a bludit blog
a CalDav (radicale)

There is a syncthing running for backups done with borg at night (automated with a crontab).

When I htop, I don't see anything to hint me to what is causing the heating.

Any ideas of what I could do to investigate that?

Thanks a lot.

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[–] Grumpy 9 points 3 months ago (1 children)

The backflow current from fans is extremely minuscule and extremely unlikely to damage anything from that. There are even tests using a damn leaf blower on the fans and it barely generated any current. Even if it did generate a backflow, diodes on the mobo should prevent it from becoming an issue unless it's a power so great that it just fries everything, but that's basically impossible with a fan.

Here's one such experiment.

https://youtu.be/k9KA-xLLQXo

[–] [email protected] 3 points 3 months ago

Yeah. You're more likely to physically damage it by hitting the little plastic blades with too much force at the wrong angle.