user: Question: What is the I/O bus entry for the processor with a release price of $657?
Columns: ['Model number', 'sSpec number', 'Cores', 'Frequency', 'Turbo', 'L2 cache', 'L3 cache', 'GPU model', 'GPU frequency', 'Socket', 'I/O bus', 'Release date', 'Part number(s)', 'Release price ( USD )']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Core i7-4700HQ', 'SR15E(C0)', '4', '2.4 GHz', '8/9/9/10', '4 × 256 KB', '6 MB', 'HD Graphics 4600', '400–1200 MHz', 'BGA-1364', 'DMI 2.0', 'June 2013', 'CL8064701470302', '$383']
SQL:

assistant: SELECT "I/O bus" FROM "Table" WHERE "Release price ( USD )" = '$657';