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Pressure-optimised fan P14 with PWM, 4-pin, 140mm, white.  Features:  Optimized for static pressure. During the development of the new P14 PWM, special emphasis was placed on a focused airstream and thus a high static pressure. The fan guarantees extremely efficient cooling, even with increased air resistance. Therefore, the P14 PWM is particularly suitable for use on heatsinks and radiators. High quality bearing. Thanks to an alloy/lubricant combination developed in Germany, friction within the bearing is reduced and greater efficiency is achieved. As a result, there is less heat development as well as less bearing noise, which means you can enjoy a longer service life from your fan. More efficient technology. The motor is powered by a PWM IC of the newest generation, which allows the new P14 PWM to run much more efficiently than its predecessors. This saves energy without compromising the performance. Maximum quietness, minimum vibration. Even at low speeds the operating sound of the new ARCTIC motor is barely noticeable. Due to a sinus-magnetizing the new motor only creates about 5 % of the vibration from commutation of a regular DC-motor without filter. Consequently, there is no need for rubber spacers due to the steady and smooth torque of the new motor. 200-1700 rpm regulated via PWM. Thanks to the 4-Pin Connector, the rpm can be regulated in a broad spectrum via PWM. In this way, noise is kept at a minimum while maximum cooling performance is guaranteed when needed. Extended Life Span. A 10°C lower motor temperature roughly doubles the life span of a fan. Due to the low coil temperature of the new ARCTIC fan motors, the service life of the fans increases considerably. Therefore, manufacturer gives the warranty of 6 years. Two way installation. Push warm air out of the case. Pull cool air into your case.  Specifications:  Speed: 200-1700 rpm. Air flow: 72.8 CFM / 123.76 m³ / h. Static pressure: 2.40 (mm/H2O). Noise level: 0.3 Sone. Bearing: fluid dynamic bearing. Voltage / current 0.12A / 12V DC. Starting voltage: 3.9V. Connector: 4-Pin-Connector. Cable length: 400 mm. Color: white. Dimensions: 140x140x27 mm. Weight: 194 g.  Warranty: 6 years.