This is an output connector that is connected to the fan or multiple fans using splitter cables. If the controller enters the No Stop mode the Green LED would light up.Īt the base of the controller, there is a 4-pin connector. It is a toggle button that would either turn the No Stop mode on or off with the push. This button sets the PWM duty cycle between 0 and 100% in manual mode (when the controller is working standalone) or adjusts the input signal from 100 to 0% in motherboard control mode. Then we have a speed dial button below the LED indicators. If it is on then the fans are in no stop mode. Green LED indicates the “No Stop” mode status.The more brightness would show the maximum PWM duty cycle being applied. Orange LED indicates the speed setting in terms of brightness.One is in the Orange color and the other is in the green color. It is a slim form factor controller which makes its installation and handling convenient inside the PC Case. The dimension of the controller is 21x25x48mm. Thanks to the supplied 3-way split cable and power supply adaptor, up to 3 fans can be controlled simultaneously.” While the brightness of the orange status LED provides visual feedback on the current dial setting, the push button allows the NA-FC1 to be switched into “no stop” mode, which prevents the fan from falling below a speed of 300rpm. By adjusting the NA-FC1’s speed control dial, users can either manually set a PWM duty cycle from 0 to 100% or reduce the PWM duty cycle supplied by PC motherboards in order to have the fans running slower than the automatic motherboard fan control would allow. Here is what the Noctua is saying about these, “The NA-FC1 is a compact, highly flexible controller for 4-pin PWM fans that can both work on its own for manual speed reduction and also work in tandem with the automatic motherboard fan control.

The content list is printed on the leaflet. The presentation of the product is quite effective. The foams are shipped inside a paper board packing box. The NA-FC1 is listed at $24.15 on AMAZON US and £24.11 on AMAZON UK. The controller has a speed dial to regulate the PWM duty cycle. The controller can work with the motherboard for the PWM signal as well as can work as a standalone controller. It is a slim fan controller which allows the user to control up to 3x PWM fans. We will be taking a spin on a handy accessory from the Noctua which is NA-FC1.

Motherboard fan controller