Case Fan - Universal - Server CPU Cooling Copper Heatsink Cooling Fan Computer Mobile Processor Active Cooling(Black) Highlights Universal Server CPU Cooling Copper Heatsink Cooling Fan Computer Mobile Processor Active Cooling(Black) Server CPU Cooler COPPER HeatSink Cooling Fan Mobile CPU Active cooling Active cooling Mounting hole distance: 50mm x 50mm Heat material: copper Heat treatment technology: FIN Net weight: 102g Thermal conductive materials: AD66 (thermal conductivity: > 4.0W/mk) Specifications Cooling Fan Size: Dimension: 50mm x 50mm x 21mm (5021) Bearing Type: Dual Ball Bearing Rated Voltage: 12V Speed Reference: 4700RPM Airflow: 11.93CFM Noise: 28.5dBA Life: 70000h Connection: 3Pin NOTE : 1.PLS Make sure this cooler can fit your CPU model, if you are not sure, please contact us. 2.When your mounting radiator,pls don't twist the singular screw at one time,need to fix the four screwed series,then turn them tight one by one at a time.(Make sure the CPU can contact heatsink totally and keep computer balance don't make it crushed)