CREATE TABLE table_51063 ("Model number" TEXT, "sSpec number" TEXT, "Frequency" TEXT, "GPU frequency" TEXT, "L2 cache" TEXT, "I/O bus" TEXT, "Memory" TEXT, "Socket" TEXT, "Release date" TEXT, "Part number ( s ) " TEXT)

What is sSpec Number, when Frequency is 1 GHZ?
SELECT "sSpec number" FROM table_51063 WHERE "Frequency" = '1 ghz'
SELECT "sSpec number" FROM "table_51063" WHERE "Frequency" = '1 ghz'