1GB, DDR2, 400MHz, 240-pin DIMM
IBM 39M5920, 1 GB, 2 x 0.5 GB, DDR2, 400 MHz, 240-pin DIMM
IBM 39M5920. 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, Memory form factor: 240-pin DIMM