SK hynix 128GB DDR4-3200 ECC LRDIMM (HMABAGL7CBR4N-XN) – 4DRx4 Load-Reduced Server RAM

Terabyte-class server memory, 128GB at a time.

The SK hynix HMABAGL7CBR4N-XN is a 128GB DDR4-3200 ECC LRDIMM built on C-die DRAM in a 4DRx4 configuration. It gives administrators the per-slot capacity needed for dense virtualization, big-data analytics, and in-memory applications on DDR4 Intel Xeon Scalable and AMD EPYC servers.

Why High-Capacity LRDIMMs Exist

Some workloads need far more memory per server than standard RDIMMs can provide: large in-memory databases such as SAP HANA, dense virtualization, and analytics clusters. Load-Reduced DIMMs exist for exactly this case.

An LRDIMM adds data buffers alongside the register chip, so the memory controller sees a lighter electrical load even when each module carries many ranks of high-density DRAM. That allows 128GB per slot while keeping signal integrity across fully populated channels.

This module runs at 3200 MT/s on supporting platforms at 1.2V. Its 4DRx4 layout uses stacked DRAM, and ECC protects every access.

Dense Virtualization Hosts

With 128GB per slot, a two-socket server can host hundreds of virtual machines, reducing node count and rack space.

Signal Integrity in Fully Populated Channels

Data buffers on the LRDIMM isolate the DRAM load from the memory bus, helping servers maintain stable speeds with two DIMMs per channel.

How to Install the SK hynix 128GB Server Memory

1. Shut down the server, disconnect all power cords, and wear an anti-static wrist strap.
2. Open the chassis and follow the vendor’s DIMM population guide so channels are balanced across each processor.
3. Align the module notch with the slot key and press evenly until both ejector latches lock.
4. Power on, allow memory training to finish, and confirm capacity, speed, and ECC status in BIOS or the management controller (iDRAC, iLO, XClarity, IPMI).