CPU Socket: 2011, Square ILM, (Mounting pitch: 80 x 80mm); CPU Support: Intel Sandy Bridge Romley-EP/EX Processors up to TDP 160 Watts; Solution: 3U & Up, Workstation & Tower Desktop Solution; Overall Dimension: 91.0 x 91.0 x 110.0 mm; Weight: 530 g; Material: Aluminum Fins, 4x Heat Pipes with H.C.C. Technology; * Lead Wire Pin Out: Pin1- (-); Pin2- (+); Pin3- (Techometer/Signal output); Pin4- (PWM); * Fan Dimension: 92 x 25 mm; Speed: At Duty Cycle 20%: 1000 RPM; At Duty Cycle 50%: 1800 RPM; At Duty Cycle 100%: 2500 RPM; Bearing: 2 Ball Bearing; Rated Voltage: 12 V; Power: At Duty Cycle 20%: 0.96 W; At Duty Cycle 50%: 1.44 W; At Duty Cycle 100%: 3.0 W; Air Flow: At Duty Cycle 20%: 17.34 CFM; At Duty Cycle 50%: 31.21 CFM; At Duty Cycle 100%: 43.36 CFM; Noise Level: At Duty Cycle 20%: 17.0 dBA; At Duty Cycle 50%: 24.78 dBA; At Duty Cycle 100%: 31.92 dBA; Air Pressure: At Duty Cycle 20%: 0.48 mm-H2O; At Duty Cycle 50%: 1.55 mm-H2O; At Duty Cycle 100%: 3.0 mm-H2O;