128GB 4x 32GB PC4-23400R RDIMM DDR4 2933 RAM per APPLE MAC PRO 2019 A1991
Class: DDR4. Mac A1991 Ram Class: DDR4. Kit Capacity: 128GB. SubFamily: 2019. Capacity: 32GB. Your computer loads a program or file you select from the hard drive in to your computers RAM, then it will access each bit of data from there.