Addon HPE 128GB PC4-19200 DDR4-2400MHz Registered ECC CL17 288-Pin Load Reduced DIMM 1.2V Octal Rank Memory Module. The 809208-B21-AM Addon HPE memory module features 128GB of DDR4-2400MHz RAM, ensuring high capacity and performance for demanding server applications. This registered ECC module offers improved reliability with error correction capabilities, operating at a low voltage of 1.2V. With a CL17 latency and 288-pin configuration, it is designed as an octal rank load reduced DIMM, providing enhanced efficiency and stability for HPE servers.