HP 64GB DDR4, 64 GB, 4 x 16 GB, DDR4, 2400 MHz, 288-pin DIMM HP 64GB DDR4. Component for: PC/Server, Internal memory: 64 GB, Memory layout (modules x size): 4 x 16 GB, Internal memory type: DDR4, Memory clock speed: 2400 MHz, Memory form factor: 288-pin DIMM