Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_13615 ( "Model number" text, "sSpec number" text, "Frequency" text, "Turbo" text, "GPU frequency" text, "Cores" text, "L2 cache" text, "L3 cache" text, "I/O bus" text, "Mult." text, "Memory" text, "Voltage" text, "Socket" text, "Release date" text, "Part number(s)" text, "Release price ( USD )" text )

### Question ###
What is I/O bus when socket is socket g1bga-1288?

### Accurate SQL ###

SELECT "I/O bus" FROM table_13615 WHERE "Socket" = 'socket g1bga-1288'