HP 8GB PC3-12800R, 8 GB, 1 x 8 GB, DDR3, 1600 MHz, 240-pin DIMM HP 8GB PC3-12800R. Component for: PC/Server, Internal memory: 8 GB, Memory layout (modules x size): 1 x 8 GB, Internal memory type: DDR3, Memory clock speed: 1600 MHz, Memory form factor: 240-pin DIMM, CAS latency: 11, ECC