Hexus has reviewed the latest all copper Pentium4 heatsink from korean manufacturer Zalman. The huge heatsink, taking up an area of 109mm x 109mm, is the biggest we've seen. Opening up the package reveals the CNPS7000-Cu in all its copper glory. Aesthetically pleasing too. The fan's an oddly-sized 85mm in diameter. Simple mechanics tells us that a larger diameter fan can push a greater CFM of air given the same RPM as a smaller one. Alternatively, you can lower the rotation speed to achieve the same air displacement as the smaller fan. The overall very positive review can be found here.