The 14cm Slip Stream 1200RPM high performance fan pushes an immense air flow of 65.2CFM for a low 23.2dBA. Compatible with both 120mm and 140mm fan mounts, this excellent cooling solution employs a highly efficient nine bladed fan design that comes close to achieving an impressive four to one air flow to noise output ratio! The 140mm Slip Stream's aerodynamic design grants it up to 40 percent more airflow than other similar fans available in the market. A 3pin to 4pin peripheral connector adapter is also included, so you can run this fan off either a 3pin motherboard or fan controller header, or connect it directly to your PSU. For ease of installation, four mounting screws are also included in the pack.