CREATE TABLE table_13572 ("Model number" CLOB, "sSpec number" CLOB, "Cores" CLOB, "Frequency" CLOB, "Turbo" CLOB, "L2 cache" CLOB, "L3 cache" CLOB, "GPU model" CLOB, "GPU frequency" CLOB, "Socket" CLOB, "I/O bus" CLOB, "Release date" CLOB, "Part number ( s ) " CLOB, "Release price  (  USD  ) " CLOB)

What's the GPU frequency that has ultra-low power in cores?
SELECT "GPU frequency" FROM table_13572 WHERE "Cores" = 'ultra-low power'
SELECT "GPU frequency" FROM "table_13572" WHERE "Cores" = 'ultra-low power'