Question -> can one connect ledstrip 22 leds on same channel as fans -> total 90 leds.
Yes, this is possilbe, if the LED Strip is compatible with RGBpx System (The LED Strip must use WS2812B LEDs).
You have to solder a diy Connector to RGB Port 3 on the Splitty4.
RGB LED 5 mm for RGB splitty3
This is a analogue 12V LED, and is NOT compatible with the RGBpx System.
RGBpx requires Digital adressable 5V LEDs compatible with WS2812B Standard.