be quiet! Pure Wings 2 PWM 80 (BL037)

  outstanding reliability and silent cooling   the pure wings 2 family fans are unique in their class combining outstanding reliability silent cooling and a great price-for-performance ratio. it’s impressive how much quiet technology the german engineering team has crammed into these fans at this amazing price. they are t... morehe ultimate reason to put well-known be quiet! silent cooling in your pc if you haven’t already done so.   the pure wings 2 80mm pwm model combines all of the above essential features. it provides maximum cooling airflow and operating noise levels down to a silent 19.2db(a). the increased air pressure makes the fans especially recommended for use in water cooling and air cooling setups.         practically silent operation - seven silence-optimized fan blades with high airflow capabilities reduce noise-generating turbulences while increasing air pressure - very quiet operation even at maximum speed with noise of 19.2db(a)         variable speed function - pulse width modulation (pwm) allows compatible 4-pin controllers (including those built into many motherboards) to intelligently vary the speed (and thus the noise level) of the fan - with pwm your system can ramp up the cooling when it’s needed or operate in maximum quiet mode when it’s not         product conception design and quality control in germany - perfect choice for home and office pcs gaming and multimedia systems - especially recommended for use in water cooling and cpu cooling builds - high-quality rifle bearing technology contributes to a very long lifespan of up to 80000 hours - 3-years manufacturer’s warranty