CoreParts MMG1312/4GB, 4 GB, 1 x 4 GB, DDR3, 1333 MHz, 240-pin DIMM, Green CoreParts MMG1312/4GB. Internal memory: 4 GB, Memory layout (modules x size): 1 x 4 GB, Internal memory type: DDR3, Memory clock speed: 1333 MHz, Memory form factor: 240-pin DIMM, ECC, Product color: Green