HP 8GB (4x2GB) DDR3-1600 ECC, 8 GB, 4 x 2 GB, DDR3, 1600 MHz, 240-pin DIMM HP 8GB (4x2GB) DDR3-1600 ECC. Internal memory: 8 GB, Memory layout (modules x size): 4 x 2 GB, Internal memory type: DDR3, Memory clock speed: 1600 MHz, Memory form factor: 240-pin DIMM, ECC