2x 512MB DDR2 400MHz ECC
HP 1GB DDR2 400MHz, 1 GB, 2 x 0.5 GB, DDR2, 400 MHz
HP 1GB DDR2 400MHz. Component for: PC/Server, Internal memory: 1 GB, Memory layout (modules x size): 2 x 0.5 GB, Internal memory type: DDR2, Memory clock speed: 400 MHz, ECC