"The Glacialtech F101 PWM heatsink is built around a simple concept; use the space over the motherboard chipset for extra cooling fins. The result is a collection of copper and aluminum connected together by five sintered wick copper heatpipes. The 6mm diameter heatpipes distribute heat across a standard tower heatsink format, save for an extension that juts 35mm off to one side. That annex of cooling fins hovers 66mm over the CPU so there is plenty of clearance.... but it is a rather unique approach. "
FULL STORY @ FROSTYTECH (http://www.frostytech.com/articleview.cfm?articleID=2477)