After installing BlinkT! LED strips on my Raspberry Pi’s I could no longer use the tiny little fans that came with the GeeekPi Raspberry Pi 4 Cluster Case. My Pi’s were running well over 40 degrees Celsius and going much higher on load.
My Solution…
This cheap USB powered fan on medium dropped the CPU temperature to the low 30 degrees Celsius. Its the same height as my stack of Raspberry Pi’s so it is cooling all of them evenly and quietly

