HMCG94AEBRA121N Hynix 64GB PC5-38400 DDR5 4800MHz SDRAM RDIMM 2RX4 ECC RAM

Hynix 64GB DDR5 SDRAM RDIMM

The Hynix HMCG94AEBRA121N is a high-performance 64GB PC5-38400 DDR5 4800MHz SDRAM Registered DIMM designed for enterprise-grade servers and advanced computing systems.

General Details

• Brand: Hynix
• Model Number: HMCG94AEBRA121N
• Category: 64GB DDR5 SDRAM Memory Module

Technical Specifications

Capacity and Technology

• Total Storage: 64GB
• Memory Type: DDR5 SDRAM
• Module Count: 1 x 64GB

Architecture and Organization

• Chip Layout: 2Rx4
• Rank: Dual Rank x4

Performance Metrics

• Bus Speed: 4800MT/s (DDR5-4800, PC5-38400)
• Latency: CL40

Reliability and Data Integrity

• Error Correction: ECC (Error-Correcting Code)
• Signal Handling: Registered DIMM

HMCG94AEBRA121N 64GB PC5 DDR5 RDIMM Memory Overview

The Hynix HMCG94AEBRA121N 64GB PC5-38400 DDR5 4800MHz SDRAM RDIMM 2RX4 ECC Memory Module belongs to a category of enterprise-class registered memory solutions designed specifically for modern data centers, high-performance servers, and mission-critical computing environments. This category represents a significant evolution from previous DDR4 RDIMM generations, offering higher bandwidth, improved power efficiency, and enhanced reliability features that are essential for contemporary workloads. DDR5 RDIMM memory modules are engineered to support scalable computing platforms where stability, capacity, and sustained performance are paramount.

DDR5 registered dual in-line memory modules introduce architectural improvements that redefine server memory performance. By doubling the number of memory banks and incorporating on-module power management, this category enables more efficient data access patterns and reduced electrical noise. The Hynix HMCG94AEBRA121N module exemplifies these advancements by delivering a balanced combination of speed, capacity, and signal integrity, ensuring seamless compatibility with next-generation server processors and chipsets.

64GB Capacity for High-Density Server Configurations

Memory modules in the 64GB RDIMM category are designed to address the growing demand for higher memory density in enterprise systems. As virtualization, containerization, and in-memory databases continue to expand, servers require larger memory footprints to maintain optimal performance. The 64GB capacity of the Hynix HMCG94AEBRA121N allows system architects to populate fewer DIMM slots while still achieving substantial total memory capacity, which is particularly beneficial in systems with limited slot availability.

This capacity class supports demanding workloads such as enterprise resource planning platforms, large-scale analytics engines, virtualization clusters, and cloud infrastructure nodes. By utilizing high-density DDR5 RDIMMs, organizations can reduce overall hardware complexity, improve airflow within server chassis, and optimize power consumption across memory subsystems.

PC5-38400 Bandwidth Classification

The PC5-38400 classification indicates a theoretical maximum bandwidth of 38.4 gigabytes per second per module. This level of throughput is a defining characteristic of DDR5 memory technology and represents a substantial increase over DDR4 standards. Memory modules within this category are engineered to support data-intensive operations that require rapid access to large datasets, minimizing latency and preventing memory bottlenecks.

High-bandwidth RDIMM modules such as the Hynix HMCG94AEBRA121N are particularly well-suited for applications that rely heavily on memory performance, including scientific simulations, artificial intelligence model training, real-time analytics, and high-frequency transactional systems. The increased bandwidth enables processors to maintain higher utilization levels, thereby improving overall system efficiency.

DDR5 4800MHz Operating Frequency

The 4800MHz operating frequency places this memory module firmly within the baseline performance tier of DDR5 technology, providing a stable and widely supported speed for enterprise platforms. DDR5-4800 is designed to offer an optimal balance between performance, power efficiency, and compatibility, making it a preferred choice for a wide range of server deployments. This frequency ensures consistent performance under sustained workloads without compromising system stability.

DDR5-4800 RDIMM modules are validated for continuous operation in demanding environments, where thermal management and electrical stability are critical. The Hynix HMCG94AEBRA121N adheres to JEDEC specifications, ensuring predictable behavior across different server platforms and motherboard designs. This consistency is essential for enterprises that require standardized configurations across multiple systems.

Registered DIMM Design and Signal Integrity

Registered DIMMs, commonly referred to as RDIMMs, incorporate a register between the memory controller and the DRAM chips. This design enhances signal integrity by reducing the electrical load on the memory controller, allowing systems to support higher memory capacities and more populated DIMM configurations. The Hynix HMCG94AEBRA121N exemplifies the benefits of RDIMM architecture by enabling reliable operation in densely populated server memory channels.

This category of memory modules is specifically intended for server and workstation platforms that require stability and scalability beyond what unbuffered memory can provide. The register acts as a buffer, ensuring that command and address signals are properly synchronized, which is critical in systems with multiple memory modules installed.

Advantages in Multi-DIMM Configurations

In enterprise servers, it is common to populate multiple DIMM slots per memory channel to maximize capacity. RDIMM modules such as the Hynix HMCG94AEBRA121N are designed to maintain signal quality even in these complex configurations. This capability allows system designers to scale memory capacity without encountering stability issues or performance degradation.

By supporting higher DIMM counts per channel, registered memory modules provide greater flexibility in system design. This flexibility is essential for data centers that need to adapt to evolving workload requirements without frequent hardware replacements.

2RX4 Memory Rank and Organization

The 2RX4 configuration of the Hynix HMCG94AEBRA121N indicates a dual-rank module with x4 DRAM devices. This organization is optimized for server environments, providing improved performance characteristics and enhanced error correction capabilities. Dual-rank memory modules can offer better interleaving opportunities, which can lead to higher effective memory throughput under certain workloads.

The x4 DRAM organization is particularly advantageous in enterprise systems because it enhances error detection and correction capabilities. By distributing data across more memory chips, x4 configurations provide greater resilience against chip-level failures, which is a critical consideration in mission-critical applications.

Performance Implications of Dual-Rank Design

Dual-rank memory modules can improve memory access efficiency by allowing the memory controller to alternate between ranks, reducing idle cycles and improving overall throughput. This characteristic is beneficial in workloads that involve frequent memory accesses, such as database queries and virtualization environments.

The 2RX4 layout also contributes to improved reliability, as it works in conjunction with ECC mechanisms to detect and correct errors more effectively. This combination of performance and reliability makes this category of memory modules a preferred choice for enterprise deployments.

ECC Error Correction for Data Integrity

Error-Correcting Code memory is a fundamental requirement in enterprise computing environments where data integrity cannot be compromised. The Hynix HMCG94AEBRA121N includes advanced ECC functionality that detects and corrects single-bit memory errors and identifies multi-bit errors. This capability is essential for preventing data corruption, system crashes, and unpredictable behavior in critical applications.

ECC memory modules are widely used in servers, workstations, and network appliances that operate continuously and process sensitive data. By incorporating ECC at the hardware level, this category of memory provides an additional layer of protection that complements software-based error handling mechanisms.

Power Efficiency and Thermal Management

DDR5 memory technology introduces significant improvements in power efficiency compared to previous generations. The inclusion of on-module power management integrated circuits allows for more precise voltage regulation, reducing overall power consumption and heat generation. Memory modules in this category are designed to operate efficiently under sustained workloads, contributing to lower total cost of ownership for data center operators.

The Hynix HMCG94AEBRA121N benefits from these advancements by maintaining stable performance while minimizing thermal output. Efficient thermal characteristics are essential for high-density server environments, where effective cooling is critical to system reliability and longevity.

Impact on Data Center Operations

Lower power consumption at the memory level translates into reduced cooling requirements and lower energy costs across the data center. DDR5 RDIMM modules support these objectives by delivering higher performance per watt, enabling organizations to scale computing resources without proportional increases in energy usage.

This efficiency also supports sustainability initiatives by reducing the environmental impact of large-scale computing operations, making DDR5 memory a strategic choice for forward-looking enterprises.

Compatibility with Modern Server Platforms

DDR5 RDIMM memory modules are designed to be compatible with the latest server processors and chipsets that support DDR5 technology. The Hynix HMCG94AEBRA121N adheres to industry standards, ensuring broad compatibility across major server platforms. This standardization simplifies system integration and reduces the risk of compatibility issues during deployment.

As server architectures continue to evolve, DDR5 memory provides a future-ready foundation that supports higher core counts, increased memory channels, and advanced interconnect technologies. This category of memory modules is positioned to support long-term infrastructure planning and scalability.