HMCG94AGBRA SK Hynix HMCG94AGBRA 64GB DDR5-5600 ECC Registered RDIMM 288-Pin Server Memory Module

The SK Hynix HMCG94AGBRA is a premium 64 GB DDR5 Registered DIMM memory module engineered to deliver remarkable performance, efficiency, and reliability for modern enterprise and high-performance computing environments. Designed and manufactured by SK Hynix, a global leader in memory technology, this module represents the next generation of server memory — combining high capacity, industry-leading speed, and robust error-correction to support demanding workloads in servers, workstations, virtualization infrastructures, and large-scale data centers.

SK Hynix HMCG94AGBRA Specifications

SK Hynix HMCG94AGBRA is a 64GB DDR5-5600 ECC Registered RDIMM designed for enterprise servers and data center applications. It features 288-pin form factor, 1.1V low-voltage operation, and dual-rank x4 architecture, delivering high bandwidth, stability, and reliability for mission-critical workloads.

Next-Generation DDR5 Performance

At its core, the HMCG94AGBRA leverages cutting-edge DDR5 SDRAM technology, operating at an impressive 5600 MT/s speed. This high data rate significantly improves memory bandwidth and throughput compared with previous DDR4 standards, enabling faster data access and smoother multitasking for memory-intensive applications. Whether deployed in virtualization clusters, database servers, or AI/ML workloads, this module ensures your systems consistently operate at peak performance.

With a bus speed of DDR5-5600 (PC5-44800), the memory delivers rapid transfer rates ideal for high throughput requirements. The result is accelerated system responsiveness, reduced latency under heavy load, and improved overall efficiency for performance-critical operations.

Massive 64 GB Capacity for High-Demand Workloads

Each HMCG94AGBRA module offers a spacious 64 GB memory capacity, providing substantial headroom for multitasking, virtualization, large-scale computation, and memory-hungry workloads. In modern server environments where memory footprint directly impacts performance, having a high-capacity module like this enables support for more virtual machines, larger in-memory databases, and extensive parallel processing tasks without compromising speed or reliability.

The large capacity also makes it ideal for applications such as real-time data analytics, cloud computing platforms, and enterprise-level transaction processing — environments where memory availability and stability are mission-critical.

Registered (RDIMM) with ECC for Enterprise Reliability

The HMCG94AGBRA is a Registered DIMM (RDIMM) module, which means it includes a register between the memory controller and the DRAM chips to buffer commands and addresses. This improves signal integrity and enables stable operation at higher capacities and speeds — especially important in multi-module configurations found in servers and enterprise systems.

Equipped with ECC (Error-Correcting Code) support, this memory module automatically detects and corrects single-bit memory errors in real time to reduce the risk of data corruption. ECC memory is crucial in mission-critical systems where even a minor memory error can lead to system instability, data loss, or application failures. With ECC and RDIMM design, HMCG94AGBRA is purpose-built for high-availability servers, database systems, and other enterprise computing needs.

Efficient Power Consumption and Thermal Performance

The module operates at low voltage (1.1 V), a standard for DDR5 memory that enhances energy efficiency compared to older DDR4 modules. Reduced operating voltage translates to lower power draw and heat generation — beneficial for data centers and rack environments where cooling and energy costs are major concerns.

Lower power consumption not only helps reduce operating expenses but also extends component longevity, contributing to the overall durability of your server infrastructure.

Industry-Standard Form Factor and Broad Compatibility

HMCG94AGBRA conforms to the 288-pin RDIMM form factor, providing physical and electrical compatibility with a broad range of modern server and workstation platforms that support DDR5 RDIMM memory. The module’s industry-standard design ensures it fits seamlessly into systems from major OEMs such as Dell, HPE, Lenovo, Cisco, and others that have adopted DDR5 ECC RDIMM support.

Whether you’re upgrading existing infrastructure or building new systems, the standardized module footprint and compliance with JEDEC specifications make installation straightforward, with minimal compatibility concerns when used with certified server boards.

Dual-Rank x4 Architecture

This memory module uses a Dual Rank x4 (2Rx4) configuration. Dual rank memory essentially provides two sets of memory banks on the module, allowing for improved performance and flexibility in handling simultaneous data streams. The x4 organization supports efficient data handling and contributes to maximizing throughput while maintaining speed and reliability under load.

Dual rank designs are well-suited for server environments where balanced memory access and performance are vital, such as database servers, high-performance workstations, and virtualized systems.

Ideal Use Cases

The SK Hynix HMCG94AGBRA memory module excels in a variety of high-demand computing environments, including:

• Enterprise Servers – Support for database engines, business-critical applications, and multi-tenant services.

• Virtualization Platforms – Enables higher VM density and better performance in hypervisor configurations.

• High-Performance Computing (HPC) – Delivers the bandwidth and capacity required for science, engineering, and analytics workloads.

• Cloud & Data Center Deployments – Efficient, scalable, and reliable memory for cloud infrastructure, edge compute, and large data pools.

• Workstations – Ideal for professional content creation, simulation, CAD, and media rendering workflows.

Quality and Reliability from a Trusted Brand

SK Hynix is recognized worldwide for producing high-quality memory products used by top-tier server manufacturers and OEM partners. With a solid track record of innovation and reliability, SK Hynix memory modules undergo rigorous testing and validation to ensure consistent performance in enterprise environments.

Choosing SK Hynix memory ensures you are investing in technology backed by industry expertise, robust manufacturing processes, and compatibility with enterprise-grade server ecosystems.

Cross Reference / Alternative Part Numbers

The SK Hynix HMCG94AGBRA 64GB DDR5-5600 ECC RDIMM is commonly cross-referenced with equivalent DDR5 registered memory modules from leading enterprise memory manufacturers. These alternatives offer similar capacity, speed, voltage, and ECC functionality and are often considered during sourcing, lifecycle management, or supply-chain optimization.

Compatible / Equivalent DDR5 RDIMM Alternatives

• Samsung

  • M321R8GA0BB0-CQK – 64GB DDR5-5600 ECC RDIMM, 288-Pin, 1.1V

  • M321R8GA0BB0-CWM – 64GB DDR5-4800 ECC RDIMM (speed-down compatible)

• Micron

  • MTC40F2046S1RC56B – 64GB DDR5-5600 ECC Registered DIMM

  • MTC40F2046S1RC48B – 64GB DDR5-4800 ECC RDIMM

• SK Hynix (Same Family / Speed Variants)

  • HMCG94AGBRA (This Product) – 64GB DDR5-5600 ECC RDIMM

  • HMCG94AGBRA-X – OEM or platform-specific suffix versions

  • HMCG94AGBPA – Lower speed DDR5 ECC RDIMM variant

⚠ Important Notice:
Compatibility depends on server platform, BIOS firmware, memory population rules, and CPU generation. Always verify part number, speed support, and rank configuration with your system vendor or engineering team before deployment.

This cross-reference section helps procurement teams quickly identify qualified alternatives, reduce lead-time risk, and maintain BOM flexibility across enterprise and data-center deployments.

DDR5 64GB RDIMM Comparison Table

The SK Hynix HMCG94AGBRA, Samsung M321R8GA0BB0-CQK, and Micron MTC40F2046S1RC56B are all 64GB DDR5-5600 ECC RDIMM modules designed for enterprise servers. They share identical core specifications, making them suitable alternatives for qualification, multi-vendor sourcing, and supply-chain continuity.

FAQ About SK Hynix HMCG94AGBRA

What is SK Hynix HMCG94AGBRA used for?

SK Hynix HMCG94AGBRA is a 64GB DDR5-5600 ECC RDIMM designed for enterprise servers, data centers, and virtualization platforms. It supports high memory bandwidth, error correction, and stable operation in mission-critical computing environments.

Is HMCG94AGBRA compatible with DDR5-4800 or DDR5-5200 systems?

Yes. The HMCG94AGBRA DDR5-5600 RDIMM can operate at lower speeds such as 5200 MT/s or 4800 MT/s when installed in systems that do not support 5600 MT/s, subject to CPU and BIOS limitations.

Is SK Hynix HMCG94AGBRA ECC registered memory?

Yes. HMCG94AGBRA is an ECC Registered DIMM (RDIMM) that supports error detection and correction, improving data integrity and system stability for enterprise and server-class applications.

Can HMCG94AGBRA be mixed with Samsung or Micron DDR5 RDIMM modules?

Mixing memory from different manufacturers is not recommended unless validated by the system vendor. For optimal compatibility and stability, identical capacity, speed, rank, and part numbers should be used within the same memory population.

What servers support SK Hynix HMCG94AGBRA?

HMCG94AGBRA is supported by DDR5-enabled server platforms from major OEMs such as Dell, HPE, Lenovo, and Supermicro, provided the system supports DDR5 ECC RDIMM 64GB modules. Always verify with the server QVL.

Request a Quote for SK Hynix HMCG94AGBRA

Looking to source SK Hynix HMCG94AGBRA 64GB DDR5-5600 ECC RDIMM for your server, data center, or enterprise project?

Submit an RFQ to receive real-time pricing, availability, and lead-time information from our global supply network.