Zalman CNPS7700-Cu Low Noise Heatsink
 

The Zalman CNPS7700-Cu is one of the largest heatsinks in production by this Korean manufacturer, and like most Zalman coolers it is squarely aimed at low noise operation. The CNPS7700-Cu is an extension of the CNPS7000-Cu series, though it is about 30mm larger in total diameter, and weighs in at a hefty 918 grams. The heatsink is compatible with socket 478 & 775 Intel Pentium and Core 2 Duo processors, and socket 754/939/940 & AM2 AMD Athlon64 chips. Zalman assemble the CNPS7700-Cu heatsink from about 60 individual copper fins which are joined together at the center; the metal fins are compressed under great pressure and bolted firmly together to create the resulting heatsink shape, sort of like advanced origami.