CREATE TABLE table_13613 ("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 the voltage when there are 2 cores, turbo is 5/8 and the release date is September 2010?
SELECT "Voltage" FROM table_13613 WHERE "Cores" = '2' AND "Release date" = 'september 2010' AND "Turbo" = '5/8'
SELECT "Voltage" FROM "table_13613" WHERE "Cores" = '2' AND "Release date" = 'september 2010' AND "Turbo" = '5/8'