Intel D74883-001 Socket LGA 775 Copper Core Heatsink & Fan 4-Pin For the following Socket LGA775 Quad Core Processors: Core 2 Extreme: QX6700, QX6800 & QX6850, and Core 2 Quad: Q6600 & Q6700 4-Pin Connector w/ Thermal Pad Socket LGA 775 Copper Core Heatsink