HP 6DD91AV, 8 GB, 1 x 8 GB, DDR4, 2666 MHz, 288-pin DIMM HP 6DD91AV. Component for: PC/server, Internal memory: 8 GB, Memory layout (modules x size): 1 x 8 GB, Internal memory type: DDR4, Memory clock speed: 2666 MHz, Memory form factor: 288-pin DIMM