Features: 1.Designed for 2011 Motherboard: This CPU air cooler is specially designed for 2011 motherboard with backplate, suitable for version B instead of version A and C. 2.6 Heat Pipes: This desktop CPU cooling fan is designed with 6 heat pipes, and the heat can be transferred to the fins quickly without any obstacles. 3.Low Noise Operation: This CPU cooling fan adopts sturdy copper and aluminium material. Hydraulic bearing adopted, only 22dB low noise won't cause any disturbance and troubles to your operation. 4.Easy Connection: This CPU cooler adopts 3pin connector adopts 3pin power connector, which can be easily connected with your CPU and mounted on the motherboard. 5.Simple Installation: This CPU cooling fan can be easily installed without complicated steps, up to 50000 hours of industrial service life. Combined with the high thermal conductivity of the thermal paste, which can perfectly perform the cooler's powerful cooling. specification:Item Type: CPU Air Cooler Material: Copper, Aluminium Light Effects: No Lights Interface Type: 3pin Fan Size: Approx. 90 x 90 x 25mm / 3.5 x 3.5 x 1.0in ( Manual Measurement, Slight Error May Exist ) Voltage: 12 VDC Speed: 200010% Noise: 22dB Air Volume: 48CFM Life: 50,000 Hours Bearing Type: Hydraulic Application: Designed for 2011 Motherboard With Backplate, Suitable for Version B Instead of Version A and C PackageList:1 x CPUAirCooler 1 x SiliconeGrease