The Spire Rotor Rev.4 is a cost effective Universal socket Intel and AMD cooler. The highly-precise engineered Omni-directional heat-sink provides good performance at minimal noise level. The ‘build-in’ 80x25mm DC fan creates a gently breeze from 600~2200RPM controlled by the PWM fan speed which is barely audible. Universal application to AMD sockets AM2/AM3/FM1 and Intel 1155/1156/775 sockets, which make the Rotor Rev.4 a versatile solution. AMD users do not need a single piece of tool and can just snap on the heat-sink hassle free. Intel users just need to replace the push pin bracket supplied and they’re ready to boot their system. Tested at TDP 65W with performance rate of 0.315C/W the Spire Rotor Rev.4 will keep your cpu running nice and cool.