1. Connect FAN MATE 2 (adjustable fan speed connector) to the 3-pin connector of a fan as shown in Figure 1.2. Connect FAN MATE 2 to the 3-pin CPU fan connector of the mainboard.3. Turn on the computer after assembly is finished.4. When the speed control knob is turned fully counter-clockwise, the fan speed is minimum, and the fan operates in silent mode. You can select the desired fan speed by turning the knob.warranty one year.