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Because the processor-mounting surface extends above the surface of the cam box on the socket, the heat sink bottom can be flat. The heat sink must have a flat surface of at least 40 mm x 40 mm, centered over the processor. Figure 11 shows the measured thermal performance vs. flow rate for this heat sink. This data represents the expected performance of this heat sink on a dual-core socket F (1207) processor. Based Thermal Design of Custom 2U-4P Systems Chapter 5 32800 Rev. 3.02 August 2006 Ther