Axiom 64GB DDR4-2133 ECC LRDIMM for HP - M4Z04AA, 839051-001 - 64 GB (1 x 64GB) - DDR4-2133/PC4-17000 DDR4 SDRAM - 2133 MHz - ECC - LRDIMM

64 GB of memory to maintain symmetry with processor and hard drive and bring out the ultimate computing experienceDDR4 SDRAM interface synchronizes electrical and clock signals for an efficient data transfer rateNo matter how heavy and numerous the applications that you are using 2133 MHz memory speed will run them smoothly