HP 4GB (2x2GB) DDR3-1333 ECC RAM f/ Z400, 4 GB, 2 x 2 GB, DDR3, 1333 MHz
HP 4GB (2x2GB) DDR3-1333 ECC RAM f/ Z400. Internal memory: 4 GB, Memory layout (modules x size): 2 x 2 GB, Internal memory type: DDR3, Memory clock speed: 1333 MHz, ECC