Intel Core 2 Duo E6700, 2.67GHz/4M/1066, BX80557E6700 (S/H extra) $389.00 Intel Core 2 Duo E6600, 2.40GHz/4M/1066, BX80557E6600 (S/H extra) $279.00 Intel Core 2 Duo E6400, 2.13GHz/4M/1066, BX80557E6400 $239.00 Intel Core-2 Quad Q6600, 2.4GHz/8M/1066/LGA775 - Retail $319.00 Intel Core-2 Quad Q6700, 2.66GHz/8M/1066/LGA775 - Retail $659.00