EnvyNews has posted a review on Thermalright's copper P4 heatpipe cooler

Just bought yourself an Intel Pentium 4 Prescott? Hot bugger ain't it? That is where the Thermalright SP-94 Heatsink comes in. With the same fin/heatpipe design of the SP-97, but with a different base, the SP-94 is the King of Thermalight's arsenal for the Pentium 4. Made of solid copper, the base is soldered to the fins with the heatpipes in-between. The heatpipes are used to carry liquid that evaporates to the top then condenses and falls back to the base in liquid form, repeating this cycle over and over again.

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