Just translated from Japanese to English.It has a 4,500rpm Fluid Bearing Low noise,long life Fan.The clip is designed differenty for AMD or Intel CPUs to totally optimize the bond to the Heatsink.Bear with the imperfect translation-"When installing the CPU cooler in the CPU core, the fact that adhesion of the core is raised is the important point. Because coefficient of thermal conductivity of the air is low, the opening being less crowded between, the stripe uninformed, efficiency with special care of the CPU cooler it cannot show sufficiently. Then, the case where the CPU cooler is installed, the silicon grease is painted in the CPU core, by the fact that the conduction of heat seat is put between, it is important to lower the heat resistance in the contact part of the CPU core and the CPU cooler." Looks to me like a well thought out HSF. $55.00 suggested retail,ouch!Any thoughts mikewarrior?