HP 1GB DDR2-667, 1 GB, 1 x 1 GB, DDR2, 667 MHz, 240-pin DIMM HP 1GB DDR2-667. Component for: PC/Server, Internal memory: 1 GB, Memory layout (modules x size): 1 x 1 GB, Internal memory type: DDR2, Memory clock speed: 667 MHz, Memory form factor: 240-pin DIMM, ECC