temperature

The best way to keep your cool running a Raspberry Pi 4

From home temperature monitoring to a Kubernetes cluster hosting a live Drupal website, I have a lot of experience running Raspberry Pis. I've used every model through the years, and am currently using a mix of A+, 2 model B, and 4 model B Pis.

Stack of Raspberry Pi model B and B+ 2 3 4

The 3 model B+ was the first generation that had me concerned more about cooling (the CPU gets hot!), and the Pi 4's slightly increased performance made that problem even more apparent, as most of my heavier projects resulted in CPU throttling. I've written about how the Raspberry Pi 4 needs a fan, and more recently how it might not.

The Raspberry Pi 4 might not need a fan anymore

tl;dr: After the fall 2019 firmware/bootloader update, the Raspberry Pi 4 can run without throttling inside a case—but only just barely. On the other extreme, the ICE Tower by 52Pi lives up to its name.

Raspberry Pi 4 cooling options including ICE tower cooling fan and a case mod fan
Three options for keeping the Pi 4 cozy: unmodified Pi 4 case, modded case with fan, and the ICE Tower.

A few months ago, I was excited to work on upgrading some of my Raspberry Pi projects to the Raspberry Pi 4; but I found that for the first time, it was necessary to use a fan to actively cool the Pi if used in a case.

Two recent developments prompted me to re-test the Raspberry Pi 4's thermal properties:

Laptop Temperatures: What's safe? How do I avoid overheating?

A question oft asked on the Apple Discussion boards (and other online computing forums) is: "My laptop seems really hot on the bottom* - is this safe?" This page will attempt to answer this and many other questions about iBook temperature concerns.

Why is it important to control (to a certain extent) your computer's temperature? Because a computer is like a car: if it's too cold, it won't run, and if it's too hot, it will overheat. As with all physical objects, a computer must obey the laws of physics, and when the temperature is too high or too low, things inside the computer won't work well. The optimal operating temperatures for your specific computer should be listed in the computer's manual.

Temperature Monitoring Software

There are many free software programs to help you monitor your Mac's temperature (whatever model it may be). My favorite is Temperature Monitor (free). Temperature Monitor allows you to see all temperature sensors in windows, the Dock, the menubar, or your Dashboard.

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