In-depth heatsink review:
Frostytech reviews Zalman's CNPS11X heatsink by cutting a section of heatpipe from the CPU cooler to inspect its inner composite heatpipe wick structure.
Photos of the dissected heatpipe's composite wick  sintered copper powder on top and axial groove wick below  that you're unlikely to see unless you cut it yourselves
See the link:
Zalman CNPS11X Extreme Heatsink Review - FrostyTech.com
Frostytech reviews Zalman's CNPS11X heatsink by cutting a section of heatpipe from the CPU cooler to inspect its inner composite heatpipe wick structure.
Photos of the dissected heatpipe's composite wick  sintered copper powder on top and axial groove wick below  that you're unlikely to see unless you cut it yourselves
See the link:
Zalman CNPS11X Extreme Heatsink Review - FrostyTech.com