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)

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