ApplicationCPU Intel Xeon 5500 Series Nehalem EP Processor Socket LGA 1366 for 2U Server & UpSpecificationOverall Dimension 90.0 x 90.0 x 64.0 mmWeight 490 gRoHS CompliantBackplate is not included G666 is designed for server motherboard. Mounting Kit option avaliable for Intel Core i7 desktop motherboard.Heat SinkMaterial Copper Base & Aluminum Fins with Heatpipes embeddedFanDimension 60 x 60 x 25 mmSpeed At Duty Cycle 20%: 1600 rpm At Duty Cycle 50%: 4000 rpm At Duty Cycle 100%: 8000 rpmBearing Double Ball BearingRated Voltage 12 VPower At Duty Cycle 20%: 0.6 W At Duty Cycle 50%: 1.8 W At Duty Cycle 100%: 7.2 WAir Flow At Duty Cycle 20%: 8.75 cfm At Duty Cycle 50%: 21.88 cfm At Duty Cycle 100%: 43.75 cfmNoise Level At Duty Cycle 20%: 16.85 dBA At Duty Cycle 50%: 35.94 dBA At Duty Cycle 100%: 51.0 dBAAir Pressure At Duty Cycle 20%: 0.0279 inch-H2O At Duty Cycle 50%: 0.1743 inch-H2O At Duty Cycle 100%: 0.6972 inch-H2OLead Wire Pin Out Pin1-Black (-) Pin2-Yellow (+) Pin3-Green (Techometer/Signal output) Pin4-Blue (PWM)