user: Question: What turbo has a L2 cache of 4 × 256 KB, a release date of June 2013, and a Model number of Core i7-4770S?
Columns: ['Model number', 'sSpec number', 'Cores', 'Frequency', 'Turbo', 'L2 cache', 'L3 cache', 'GPU model', 'GPU frequency', 'Socket', 'I/O bus', 'Release date', 'Release price ( USD )']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['standard power', 'standard power', 'standard power', 'standard power', 'standard power', 'standard power', 'standard power', 'standard power', 'standard power', 'standard power', 'standard power', 'standard power', 'standard power']
SQL:

assistant: SELECT "Turbo" FROM "Table" WHERE "L2 cache" = '4 × 256 KB' AND "Release date" = 'June 2013' AND "Model number" = 'Core i7-4770S';