Thermaltake ISGC-400 Heatpipe CPU Cooler with 4pin PWM Fan Core i7 Ready -CLP0540 ISGC Fan Technology; The pure white 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 Hydro Dynamic Bearing (HDB) Technology :New HDB Technology makes fan longer lifetime and less noise Copper+ Base Architecture x 6 Heatpipes. Mirror Copper Base deliver 100% touch between CPU and Cooler. Meanwhile, 6 Cooper Heatpipes - create best heat transferring Individual Large Sawtooth Fin Design :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