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 AMD Athlon64 chips. Socket AM2 is not supported. ...