The Igloo 5761 Silent heatsink uses a familiar top-down-fan approach, with three 6mm diameter exposed base heatpipes conducting heat from the CPU to a small thin aluminum fin cooling stack. The cooling fins are topped off by a bright yellow 92x92x25mm PWM vaneaxial fan that operates at a fixed speed of 1200RPM. The fan outputs roughly 34CFM of air according the mfgr's specs, the airflow being directed down through the aluminum fin array and past the three intersecting copper heatpipes.
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