64GB DDR4, 288-pin DIMM, 2666MHz, Registered (buffered)
HP 832800-B21, 64 GB, 1 x 64 GB, DDR4, 2666 MHz, 288-pin DIMM
HP 832800-B21. Internal memory: 64 GB, Memory layout (modules x size): 1 x 64 GB, Internal memory type: DDR4, Memory clock speed: 2666 MHz, Memory form factor: 288-pin DIMM