“The fan is very quiet, and effective in reducing temperatures down to managable levels. The Python software for automatically starting and stopping the fan when required is a nice touch. It's worth know that the RGB LEDs can be controlled independently of the fan operation. Thus you can just use the one board if you want to use them for an easy-to-read status indicator.”
“I love my Fan Shim: I got the following temps 52c at the end of the run/CPU stress test. The ambient was a bit more the 20c, I use (with a bit of modification and glue) the "Raspberry Pi 4 Heatsink" (only £2.40) + "Ninja – Pibow Coupé 4" + "Fan SHIMI."
I ran a prime benchmark test shown in this vid: https://www.youtube.com/watch?v=AVfvhEJ9XD0&t=88s
The results are:
To run the same test you will need to install sysbench via terminal/copy script below:
"sudo apt-get install sysbench"
#!/bin/bash
clear
#nice little loop
or f in {1..7}
do
vcgencmd measure_temp
sysbench --test=cpu --cpu-max-prime=25000 --num-threads=4 run >/dev/null 2>&1
done
vcgencmd measure_temp
=========
> vcgencmd measure_temp
> sysbench --test=cpu --cpu-max-prime=25000 --num-threads=4 run >/dev/null 2>&1
> done
temp=39.0'C
temp=51.0'C
temp=51.0'C
temp=53.0'C
temp=51.0'C
temp=52.0'C
temp=52.0'C
pi@Rip4:~ $
pi@Rip4:~ $ vcgencmd measure_temp”
