"Let's get right to the point, 3Rsystem's Iceage 120 Boss II heatsink is currently one of the Top 5 heatsinks tested on Frostytech. Key to the success of this Korean-made heatsink on both AMD and Intel synthetic test platforms are five 8mm diameter exposed base heatpipes and a unique "X" pattern that places the heatpipes in the path of high velocity air from the coolers' 120mm fan. On top of that, the Iceage 120 Boss II heatsink utilizes dimpled surface fins which are intended to disrupt boundary layer laminar airflow."
http://www.frostytech.com/articleview.cfm?articleID=2461
