4GB DDR3, 240-pin DIMM, 1600MHz
Samsung M378B51730EB-CK0, 4 GB, 1 x 4 GB, DDR3, 1600 MHz, 240-pin DIMM
Samsung M378B51730EB-CK0. Internal memory: 4 GB, Memory layout (modules x size): 1 x 4 GB, Internal memory type: DDR3, Memory clock speed: 1600 MHz, Memory form factor: 240-pin DIMM, CAS latency: 11