HMCG78AEBRA

• 16GB density, DDR5 Memory technology, RDIMM Module Type
• 4800MT/S Data Rate at a 2400M Hz Base Clock and 4800M Hz Clock Speed
• Single-Rank x8 Organization (1R X 8)
• 1.1V Operating voltage, Down from DDR4's 1.2V
• (16G X 8) X 10 Component composition, A-Die Revision
• 288-Pin DDR5 DIMM Form Factor

The SK Hynix HMCG78AEBRA is a 16GB DDR5 registered DIMM (RDIMM) rated at 4800MT/s on a 1.1V supply. RDIMMs place a register between the host memory controller and the DRAM address and command lines, which reduces electrical loading and is what allows servers to populate large capacities per channel. The module is a single-rank x8 design (1R x 8) built from a (16G x 8) x 10 component composition on A-die silicon, in the standard 288-pin DDR5 DIMM form factor.

Registered DDR5 DIMMs at this density and speed populate mainstream server and workstation platforms: virtualization hosts, database and application servers, HPC nodes, and storage controllers. The 4800MT/s rate corresponds to the first-generation DDR5 server tier, so the HMCG78AEBRA is typically bought for the installed base of those platforms rather than for newer higher-speed sockets. A single-rank x8 module is generally chosen where capacity per DIMM slot is moderate and the priority is populating many slots at low cost and power. Buyers are server OEMs and integrators, data center operators expanding existing fleets, and the aftermarket supporting memory upgrades and replacements.