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pi 4b case for 90mm round cpu fan

pi 4b case for 90mm round cpu fan

thingiverse

I'm telling you, the Pi 4b desperately needs cooling! Trust me on this one. And I've found that the only silent fan that gets the job done is an old 90mm CPU fan. So, I simply added a shroud to a box and it works like a charm - but it could definitely be improved upon. As for performance, I'm running Node Red and an MQTT broker on this setup, and the CPU stays remarkably cool at around 36/38 degrees Celsius. Give it a try and see what you think!

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