CREATE TABLE table_name_92 (release_date VARCHAR(255), l3_cache VARCHAR(255), part_number_s_ VARCHAR(255))
What is the release date of the 6 mb L3 cache with the part number by80607005259aabx80607i7740qm?
    
SQL: SELECT release_date FROM table_name_92 WHERE l3_cache = "6 mb" AND part_number_s_ = "by80607005259aabx80607i7740qm"