Does a Raspberry Pi Really Need Active Cooling?
The Raspberry Pi has become considerably more powerful over the years, but that extra performance also means more heat — particularly with the Raspberry Pi 5.
For a Pi that's occasionally running a small script, temperature might never become much of an issue. But many of us now use Pis more like small servers or desktop computers.
A Pi might be running DNS filtering, a music server/player, web services, dashboards, databases or even Chromium continuously.
Once the CPU gets hot enough, it can thermal throttle, reducing its clock speed to protect itself. Nothing necessarily crashes — the Pi simply becomes slower.
You can quickly check the temperature with:
vcgencmd measure_temp
And this gives some useful information about whether the Pi has experienced throttling:
vcgencmd get_throttled
For a Pi running 24/7, I think even a modest heatsink and fan are worthwhile. It isn't necessarily about achieving the lowest possible temperature; it's about keeping temperatures comfortably controlled when the machine is under sustained load.
The Pi 5 especially has reached the point where I regard cooling as part of the build rather than an optional extra.
What are others using?
Passive heatsink, official Active Cooler, case fan — or are you happily running yours without any active cooling?
