CREATE TABLE table_22859 ("Model" TEXT, "Year" TEXT, "Code name" TEXT, "Fab  (  nm  ) " FLOAT, "Bus interface" TEXT, "Transistor count  ( Millions ) " FLOAT, "Memory max  (  MiB  ) " TEXT, "Core  (  MHz  ) " FLOAT, "Memory  (  MHz  ) " TEXT, "Type" TEXT, "Bus Width  (  Bit  ) " FLOAT, "DirectX" TEXT, "Shader Model" TEXT, "OpenGL" TEXT, "Maximum Resolution" TEXT, "IceQ4 Cooling System" TEXT, "Notes" TEXT)

What are the notes recorded for the model HIS HD4850 (512MB)?
SELECT "Notes" FROM table_22859 WHERE "Model" = 'HIS HD4850 (512MB)'
SELECT "Notes" FROM "table_22859" WHERE "Model" = 'HIS HD4850 (512MB)'