How to improve an almost perfect cooler? This question indeed caused some sleepless nights for the engineers at Scythe! Every little detail was looked at from every thinkable angle to find room for improvement. First, the "famous" Slip Stream fan had to give way to the new Glide Stream. Then, the already very efficient cooling fin design was modified to optimize the airflow even more. But what is perfect cooling without a convenient, user-friendly mounting system? This is where the Mugen 4 really differs from its' predecessor - a totally blue-penciled, new mounting system guarantees quick, but at the same time, stable mounting on all common sockets on the market today.