80mm fan case fan rotations per minute 2 000 rpm max noise emission 155 db volume flow 442 mh airflow 2602 cfm statischer druck 225 dimensions wxhxd 80 x 80 x 25 mm width 80 mm height 80 mm depth 25 mm fan bearing liquid bearing operating power input 18 watt series be quiet shadow wings 2 pwm mtbf 300 000 hours port 4 pin weight 150 g nominal current 012 a