Thermalright TY-14013 Dimension: L150 mm x H140 mm x W13 mm Rated Speed: 700~1300RPM15% Noise Level: 30.6dBA(Max.); Air Flow: 64.52CFM Thirteen silent Torpedo blades--"submerges", gives most quiet and efficient airflow. Aerodynamic body--Less friction around the edges and give more centered and concentrated airflow.