FrostyTech has posted a review on the Taisol CEP426151A Pentium 4 Heatsink

The trend with socket 478 Pentium 4 heatsinks has either been on the side of new and extremely innovative aluminum designs, or very complex and heavy copper based heatsinks. Taisol have taken the simplicity of the extruded aluminum manufacturing process and blended it with a 4mm thick copper base plate. The idea is of course to speed the thermal energy from the processor core to a larger surface area for dispersal. Doin this with a copper heatspreader means that the heat energy is spread over the bottom surface of the aluminum extrusion more efficiently and hence the heatsink should work better.

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