Mfr Part Number: R24 CPU Application: LGA2011 Narrow Type, 56 x 94mm mounting pitch Supports Intel Sandy Bridge Romley-EP/EX Narrow ILM Processors up to TDP 160 Watts Material: Aluminum Stacked Fin with Heat Pipes Directly Contact CPU Fan: Rated Speed: At Duty Cycle 0~20%: 1500 10% RPM At Duty Cycle 50%:3500 10% RPM At Duty Cycle 100%: 7000 RPM Min Bearing: Double-Ball Rated Voltage: 12V Rated Input Power: At Duty Cycle 0~20%: 0.60 W At Duty Cycle 50%: 2.16 W At Duty Cycle 100%: 7.20 W Rated Airflow: At Duty Cycle 0~20%: 8.8 CFM At Duty Cycle 50%: 20.3 CFM At Duty Cycle 100%: 40.5 CFM Rated AcousticalLevel: At Duty Cycle 0~20%: 16.0 dBA At Duty Cycle 50%: 32.9 dBA At Duty Cycle 100%: 47.5 dBA Rated StaticPressure: At Duty Cycle 0~20%: 0.7 mm-H2O At Duty Cycle 50%: 3.6 mm-H2O At Duty Cycle 100%: 14.3 mm-H2O Lead Wire Pin Out: Pin1 - Ground (-) Pin2 - Power (+) Pin3 - Signal (Tachometer Output) Pin4 - PWM Control Dimensions: Fan: 60.0 x 60.0 x 28.0 mm Overall: 112.0 x 84.0 x 67.0 mm Weight: 400.0 5.0 g RoHS Compliant