Scythe Mugen 3 Rev. B CPU Cooler - Socket 2011, 1366, 1156, 1155, 775, FM1, AM3+, AM3, AM2+, AM2 Compatible (SCMG-3100) Compatible with the latest Socket 2011 Processors and many others Included Slip Stream PWM Fan - 300 rpm ( 180rpm) - 1600 rpm ( 10%), generating an air flow of 14.7 CFM - 88.11 CFM Flip Mount Super Back-Plate 4 for excellent compatibility and secure mounting Nickel plated copper base 2 year manufacturer warranty