FrostyTech posted a review on the 3RSystem Iceage 120 Exposed Heatpipe Base Heatsink

I'm going to do away with any suspense and just tell you that it performs in the top 10 on both AMD and Intel test platforms. The 3RSystem Iceage 120 heatsink FrostyTech is reviewing today is equipped with four exposed copper heatpipes at its base, vibration absorbing foam pads behind the fan, a 120mm low speed fan and a fan speed controller. At the other end of the 3RSystem Iceage 120 heatsink is where all the fun stuff happens. Swaged into an aluminum block are four 6mm diameter copper heatpipes which make direct contact with the CPU, so the conduction path is about as direct as it gets.

3RSystem Iceage 120 Exposed Heatpipe Base Heatsink Review