Summary: The Zalman 7700-AlCu provides superior cooling performance than its predecessor, the 7000-AlCu, which still gives it a pretty good run for the money. The small but measurable cooling gain is obtained with no serious acoustic price, as the fans on these coolers measure almost identically for SPL. Given that the 7000 remains among the most popular of high performance, low noise HSF, a product that surpasses it has to be praised.
Summary: The CNPS7700-AlCu is for a surprisingly affordable $33. Considering its compatibility with a wide range of sockets and excellent performance, that's a pretty good deal, and it's only a couple of dollars more than the 92mm fan-based CNPS7000-AlCu. To be fair, the CNPS7700-AlCu isn't much quieter than its 92mm predecessor. However, the 7700's larger fan helps it maintain lower processor temperatures, especially under load.