CoreParts 512Mb DDR2 400MHz ECC/REG, 0.5 GB, 1 x 0.5 GB, DDR2, 400 MHz, 240-pin DIMM CoreParts 512Mb DDR2 400MHz ECC/REG. Component for: PC/Server, Internal memory: 0.5 GB, Memory layout (modules x size): 1 x 0.5 GB, Internal memory type: DDR2, Memory clock speed: 400 MHz, Memory form factor: 240-pin DIMM, ECC