FrostyTech posted a review on the EKL Alphenfohn GroB Clock ner Heatsink

The Alphenfohn GroB Clock'ner heatsink on the test bench today is a
heatpipe direct contact cooler - meaning the heatpipes are exposed at the base. EKL's heatsink stands 154m tall, is 125mm across and weighs upwards of 700grams.

EKL Alphenfohn GroB Clock ner Heatsink Review