CHIEFTEC 120x120x25mm Ball Bearing PWM Fan

Variable-speed fan controllers for computers usually use PWM (pulse-width modulation), as it is far more efficient when compared to the traditional one. The PWM technology allows the 4-pin fan Chieftec AF-1225PWM to be more temperature-sensitive, so that the turning-speed can be adjusted automatically over the BIOS setup if your mainboard supports this specification.
Product Description: Chieftec AF-1225PWM - case fan | Product Type: Case fan | Fan Diameter: 120 mm | Fan Height: 25 mm | Fan Bearing: Ball bearing | Rotation Speed: 400-1650 rpm | Air Flow: 63.6 cfm | Power Connector: 4 pin Molex connector | Features: Pulse-width modulation (PWM) support | Dimensions (WxDxH): 12 cm x 12 cm x 2.5 cm