Hypertec RAM-4GDR3EC-LD-1600, 4 GB, DDR3, 1600 MHz, 204-pin SO-DIMM Hypertec RAM-4GDR3EC-LD-1600. Internal memory: 4 GB, Internal memory type: DDR3, Memory clock speed: 1600 MHz, Memory form factor: 204-pin SO-DIMM