With the Silver Arrow IB-E Extreme Rev. B Thermalright presents a specifically for highest performance designed edition of the innovative Silver Arrow IB-E. In this “Silver Arrow IB-E Extreme Rev. B” edition, by using two particularly powerful 140 mm fans, the maximum possible cooling capacity is realized. On the other side, the heatsink does not protrude beyond standard ATX motherboards, which also excludes incompatibilities with fans mounted under the top cover or power supplies installed at the top of the case. The higher distance from the aluminum fins to the copper base prevents collisions of the fan and a high-rising cooler of RAM-modules. This high-end cooler has a unique vitality. It has a unique horsepower sound. When it accelerates to a certain level, it enjoys the speed performance of this high-end speed. Intel: 775/115X/1366/2011/-3/2066/1200 AMD: AM4/AM5   Dimension: L155mm x W103mm x H163mm Weight: 850g Heat pipes: 6mm heatpipe x 8 units Fin:T=0.4mm;Gap=2mm Fan Pcs: 45 pcs Copper Base: C1100 Pure copper nickel plated TY-143 FAN Spec: Dimension: L152mm x W140mm x H26.5mm Weight: 160g Rated Speed: 600~2500RPM±10{92d0f8a9ef26b7e4fcbeba3ef12dd484c9f5d5dc4b04b81a6c2fc68f03b22aff} Noise Level: 21~45 dBA Air Flow: 31.4~130 CFM Air Pressure:0.32~3.00mm H2O Ampere:0.6A Connector: 4 Pin (PWM Fan connector) Bearing Type :Two Ball