Noctua microcontroller fan control guide

Scope and location

Separate power, speed-sense and PWM functions in named Noctua 4-pin fans.

Introduction / What are the wires of my 4-pin fan used for?

Open the original source

Inspected

2026-10-09

Access

public page

Recorded AI-assisted source inspection; not independent human approval or hardware testing.

No color scheme, wiring voltage, or connector variant is inferred for other makers.

Source inspection is separate from independent technical approval, rights clearance and hardware testing.