4GB DDR3 (2x2GB)

G.Skill RipjawsX DDR3 1333MHz 2x2GB (F3-10666CL9D-4GBXL)

G.Skill NQ DDR3 1333MHz 2x2GB (F3-10666CL9D-4GBNQ)

Crucial DDR3 1600MHz 2x2GB (CT2KIT25664BD160B)

G.Skill Value NS DDR3 1333MHz 2x2GB (F3-10600CL9D-4GBNS)

G.Skill NQ DDR3 1600MHz 2x2GB (F3-12800CL9D-4GBNQ)