#288 Raspberry Pi 4 Coolers: Which one is best? (Quickie)

It is well known that the Raspberry Pi 4 gets quite hot and reduces its processing speed if it has to work hard. In one of my Quickies, I tested the passive FLIRC case. In the comments, viewers pointed me to two Chinese cooling solutions and Cristopher Bartlett from Explaining computers tested a few others.
Time for a new Quickie with a summary of all these coolers. And some ideas for optimizations.
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Links:
Chinese Coolers: http://s.click.aliexpress.com/e/dTspeDEg or http://bit.ly/2V8ExY2 and http://bit.ly/2V4DYyd
60mm Fan: http://s.click.aliexpress.com/e/tiy0uCjW

Videos:
Explaining Computers: https://youtu.be/e6mWImsF9iI
Temperature controlled Fan 1: https://youtu.be/P5o0PpfzuW8
Temperature Controlled Fan 2: https://youtu.be/6Z-1A6oDFXI
Tips & Tricks: https://youtu.be/uYf7vFREV98
Crimpers: https://youtu.be/25qObkSUHng
#Raspberry Pi #Electronics

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Видео #288 Raspberry Pi 4 Coolers: Which one is best? (Quickie) канала Andreas Spiess