Dynatron Cooling Fan/Heatsink New CPU Socket 1155/1156; CPU Support: LGA 1155: Intel 2nd Generation Core i7-2600, i5-2500 series & Sandy Bridge Xeon Processors 1220, 1220L, 1225,1230, 1235, 1240, 1245, 1260L, 1270, 1275 & 1280; LGA1156: Intel Core i3 i3-530 & i3-540, Core i5 i5-650, i5-650, i5-660, i5-661 i5-670 & I5-750; Xeon Processor 3400 Series; Core i7 Processors, I7-870 & I7-860; Solution: 1U Server; Overall Dimension: 85.0 x 81.5 x 28.5mm; Weight: 355g; Material: Copper Heatsink; Fan Dimension: 80 x 80 x 15 mm; Speed: At Duty Cycle 0~20%: 1000 RPM; At Duty Cycle 50%: 2500 RPM; At Duty Cycle 100%: 5000 RPM; Bearing: 2 Ball Bearing; Rated Voltage: 12; Power: At Duty Cycle 0~20%: 0.60 W; At Duty Cycle 50%: 1.44 W; At Duty Cycle 100%: 9.60 W; Air Flow: At Duty Cycle 0~20%: 5.355 CFM; At Duty Cycle 50%: 7.654CFM; At Duty Cycle 100%: 14.719 CFM; Noise Level: At Duty Cycle 0~20%: 20.71 dBA; At Duty Cycle 50%: 37.5 dBA; At Duty Cycle 100%: 51.7 dBA; Air Pressure: At Duty Cycle 0~20%: 2.083 mm-H2O; At Duty Cycle 50%: 9.780 mm-H2O; At Duty Cycle 100%: 36.168 mm-H2O; Lead Wire Pin Out: Pin1-Black (-); Pin2-Yellow (+); Pin3-Green (Techometer/Signal output); Pin4-Blue (PWM);