HP 3TQ40AT, 16 GB, 1 x 16 GB, DDR4, 2666 MHz, 288-pin DIMM HP 3TQ40AT. Component for: PC/Server, Internal memory: 16 GB, Memory layout (modules x size): 1 x 16 GB, Internal memory type: DDR4, Memory clock speed: 2666 MHz, Memory form factor: 288-pin DIMM, ECC