"The Arctic Cooling Alpine 64 Pro is just such heatsink: ideal for mainstream CPUs that don't exceed 90W TDP.... so long as the fan speed stays at 2000RPM. Frostytech pushed the test scenario a little further than that of course. Arctic Cooling's Alpine 64 Pro is a mainstream extruded aluminum heatsink that features the companies signature suspended low noise fan. The design minimizes turbulence and the noise created by air moving over the edges of a traditional fan frame, by removing as much of the fan frame as possible."
FULL STORY @ FROSTYTECH (http://www.frostytech.com/articleview.cfm?articleID=2456)