HP 2GB DDR-400, 2 GB, 1 x 2 GB, DDR, 400 MHz, 184-pin DIMM HP 2GB DDR-400. Component for: PC/server, Internal memory: 2 GB, Memory layout (modules x size): 1 x 2 GB, Internal memory type: DDR, Memory clock speed: 400 MHz, Memory form factor: 184-pin DIMM, CAS latency: 3, ECC