CREATE TABLE table_name_63 (clock_speed VARCHAR(255), fsb_speed VARCHAR(255), model_number VARCHAR(255))
Which Clock Speed has a FSB Speed of 400 mhz, and a Model Number of c7-m 794?
    
SQL: SELECT clock_speed FROM table_name_63 WHERE fsb_speed = "400 mhz" AND model_number = "c7-m 794"