From what I can find, the CPU-200 block will not fit the LGA 775............
"Specifications: Model: CPU-200 G. Compatibility: AMD socket 462, Intel socket 370, Intel socket 478. Dimensions(WxHxD): 1.9" x 2.4" x 0.6" (8.2cm x 6.3cm x 2.4cm). Base Materials: Pure Copper, 21k Gold Plated."