Cited as a reference · for beginners
(#0033) 4-Wire Computer Fan Tutorial
Why people recommend it
Linked as an example when people struggle to run four-wire PC fans, showing how the PWM speed wire and tachometer output are connected.
Watch for: Four-pin fans only
In their words
I only want this fan running at maximum speed and I have seen people run these, like in this video without the PWM blue wire.
Oleenick on electronics.stackexchange.com, Nov 2018. CC BY-SA.
