user: Question: List the number of cores for DDR3-1333 with frequencies between 2.66-2.8GHz.
Columns: ['Code name', 'Brand name', 'Model (list)', 'Frequency', 'Cores/Threads', 'Max Memory Speed']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Lynnfield', 'Core i5', 'i5-7xx', '2.66-2.8GHz', '4/4', 'DDR3-1333']
SQL:

assistant: SELECT "Cores/Threads" FROM "Table" WHERE "Max Memory Speed" = 'DDR3-1333' AND "Frequency" = '2.66-2.8GHz';