CREATE TABLE table_24018112_1 (cores_threads VARCHAR(255), max_memory_speed VARCHAR(255), frequency VARCHAR(255))
List the number of cores for ddr3-1333 with frequencies between 2.66-2.8ghz.
    
SQL: SELECT cores_threads FROM table_24018112_1 WHERE max_memory_speed = "DDR3-1333" AND frequency = "2.66-2.8GHz"