Hynix HMCT04MEERA135N 128GB DDR5 4800MT/s RDIMM Memory Module

Description

The SK Hynix HMCT04MEERA135N is a high-capacity, server-grade DDR5 memory module designed for next-generation data centers. It bridges the gap between standard 64GB modules and ultra-dense 256GB variants, providing a balanced 128GB capacity for memory-intensive applications.

Technical Specifications

Key Performance Features

3DS (3-Dimensional Stacking)

To achieve the 128GB density on a single DIMM, Hynix employs 3DS (Three-Dimensional Stacking) technology. By vertically stacking DRAM dies using Through-Silicon Via (TSV) interconnects, the module maintains a standard physical footprint while significantly increasing storage capacity and reducing power consumption compared to non-stacked high-density layouts.

On-DIMM Power Management (PMIC)

In a major departure from DDR4, this module features its own Power Management Integrated Circuit (PMIC). This on-board regulation provides:

• Enhanced Efficiency: Direct voltage conversion on the DIMM reduces power loss.

• Signal Integrity: Cleaner power delivery to the high-speed 4800 MT/s chips, essential for maintaining stability in fully populated server racks.

Advanced Reliability and RAS

• On-Die ECC: DDR5 includes internal error correction within the DRAM chips themselves, which works in tandem with the system-level ECC to provide superior data protection.

• Dual 32-bit Sub-channels: The DDR5 architecture splits the 64-bit data bus into two independent 32-bit sub-channels, doubling the number of concurrent data accesses and reducing overall latency for multi-core CPUs.

• Decision Feedback Equalization (DFE): This technology cleans up signal noise at high speeds, ensuring reliable data transfers at the 4800 MT/s threshold.

Compatibility Note

The HMCT04MEERA135N is an RDIMM (Registered DIMM) intended for professional server and workstation platforms. It is designed to work with:

• Intel: 4th and 5th Generation Xeon Scalable processors (Sapphire Rapids / Emerald Rapids).

• AMD: EPYC 9004 series processors (Genoa / Bergamo).

Warning: This module is not compatible with consumer motherboards (Z790/X670) or processors (Core i9/Ryzen 9) as they do not support Registered ECC memory.