user: Question: What's the release price of a processor that has a frequency of 3.2 GHz and 1 × 6.4 GT/s QPI I/O?
Columns: ['Model number', 'sSpec number', 'Frequency', 'Turbo', 'Cores', 'L2 cache', 'L3 cache', 'I/O bus', 'Mult.', 'Memory', 'Voltage', 'Socket', 'Release date', 'Part number(s)', 'Release price ( USD )']
Types: ['text', 'text', 'text', 'text', 'real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Core i7-920', 'SLBCH(C0)SLBEJ(D0)', '2.67 GHz', '1/1/1/2', 4.0, '4 × 256 KB', '8 MB', '1 × 4.8 GT/s QPI', '20×', '3 × DDR3-1066', '0.8–1.375V', 'LGA 1366', 'November 2008', 'BX80601920AT80601000741AA', '$284']
SQL:

assistant: SELECT "Release price ( USD )" FROM "Table" WHERE "Frequency" = '3.2 GHz' AND "I/O bus" = '1 × 6.4 GT/s QPI';