CREATE TABLE table_44059 ("Model number" TEXT, "sSpec number" TEXT, "Frequency" TEXT, "GPU frequency" TEXT, "L2 cache" TEXT, "I/O bus" TEXT, "Memory" TEXT, "Voltage" TEXT, "Socket" TEXT, "Release date" TEXT, "Part number ( s ) " TEXT, "Release price  (  USD  ) " TEXT)

What is the model number for the GPU and 320 mhz?
SELECT "Model number" FROM table_44059 WHERE "GPU frequency" = '320 mhz'
SELECT "Model number" FROM "table_44059" WHERE "GPU frequency" = '320 mhz'