CREATE TABLE table_21021 ("Model number" TEXT, "sSpec number" TEXT, "Frequency" TEXT, "GPU frequency" TEXT, "L2 cache" TEXT, "I/O bus" TEXT, "Memory" TEXT, "Voltage" TEXT, "TDP" TEXT, "Socket" TEXT, "Release date" TEXT, "Part number ( s ) " TEXT, "Release price  (  USD  ) " TEXT)

Name the memory for frequency of 1.6 ghz
SELECT "Memory" FROM table_21021 WHERE "Frequency" = '1.6 GHz'
SELECT "Memory" FROM "table_21021" WHERE "Frequency" = '1.6 GHz'