The Coolermaster Vortex Plus heatsink stands 83mm tall, in total. A 25mm thick, 92mm PWM fan exhausts downward so waste air impinges on a lower extruded aluminum heatsink that sits atop the processor. It's both a good use of space for additional cooling surface area and an admission by heatsink designers that the aluminum fins above aren't getting the whole job done by themselves.



Link: Frostytech