Version 3 of Mugen provides higher compatibility with a new more compactly designed fin and a thoroughly thought out backplate. The overall cooling performance has been increased by refining the M.A.P.S. (Multiple Airflow Pass-through Structure). Mugen 3 comes with the "Slip Stream" PWM Silent fan, which minimizes the noise level at low load while maximizing the cooling performance at heavy load. Series: MUGEN 3 Type: Fan & Heatsinks RPM: 300 (±30%) - 1600rpm (±10%) - regulated by PWM Air Flow: 0 - 74.25CFM Noise Level: 0 - 26.5dBA Power Connector: 4 Pin Color: Black Compatibility: Socket AM2 / AM2+ / AM3, LGA 775 / 1155 / 1156 / 1366