Ordered to replace the original cooler Core2duo a "base" on socket 775. Big surprise (!) By opening the package, the cooler is of a size (and weight) therefore. Installation is pretty easy (well refer to the manual). Very quiet cooler (designed to cool the more powerful processors), it barely rotates to cool a processor of there 3 years ... Zalman The quality is still there, for a contained price. Delivery Amazon perfect (as usual)