Excerpt: Last I remember from Zalman, I was testing the CNPS10X coolers, of which there were four versions in total - two of which I got to look at personally. There was the Performa and the Extreme , both of which were typical tower based designs with a top cover and other tricks specific to the series. The cooler we are about to see takes on some of the attributes of these coolers, but harks back to the CNPS7 series of coolers for its outer appearance.
Summary: The Zalman CNPS11X has some of the best cooling that we have seen so far, cooling my overclocked 4.8GHz 2500k to an impressive 72 degrees Celsius while running Prime95. So as far as the cooling is concerned, the Zalman is a winner. The installation was easy enough and the supplied manual did give you all the detail that you needed to know.