The 120mm VRISGC fan which is designed by the Thermaltake to pursuit noiseless environment. Therefore, Thermaltake design to reduce the turbulence and the friction between air and fan. HDB technology makes fan longer lifetime and less noise.Mirror copper base deliver 100% touch between CPU and cooler. Meanwhile, 6 cooper heatpipes - create best heat transferring.Thermaltake designs Sawtooth onto the fins. With these sawtooth indentation, the cold air - intake become smoother. The maximum cooling performance and noise is controlled thus can be optimized through sawtooth fins.