Most case fans have either a 3-pin or a 4-pin connector, which can be plugged ... Another way to connect and control your case fan speed and RGB lighting is to use a fan controller or a hub.
A 4-channel 12V-G-R-B controller for RGB fans and LED strips using the Raspberry Pi Pico and ... Note this does not support 3-pin addressable RGB LEDs, but uses the semi-standard 4-pin 12V-G-R-B ...