HMCG94AHBRA488N Hynix 64GB DDR5 6400MT/s PC5-51200 ECC Ram

Highlights of Hynix HMCG94AHBRA488N 64GB DDR5 6400MT/s

The Hynix HMCG94AHBRA488N 64GB DDR5 memory module is designed for high-performance enterprise servers and data center environments. Built with advanced DDR5 SDRAM technology, this ECC registered RDIMM delivers exceptional speed, stability, and scalability for modern computing workloads.

General Information

• Manufacturer: SK Hynix
• Part Number: HMCG94AHBRA488N
• Product Type: Server Memory Module
• Sub Type: DDR5 6400MT/s PC5-51200

Technical Specifications

• Total Capacity: 64GB
• Module Layout: 1 x 64GB
• Rank Structure: 2Rx4

Performance Specifications

• Bus Speed: 6400MT/s
• Memory Standard: DDR5-6400 / PC5-51200
• CAS Latency: CL46

Reliability and Error Protection

• Error Correction Code (ECC): Yes
• Signal Processing: Registered (RDIMM)
• Enhanced data accuracy and system uptime

Physical Characteristics

• Form Factor: 288-Pin RDIMM
• Shipping Dimensions: 1.00 in (H) x 6.75 in (D)
• Shipping Weight: 0.20 lb

Key Features and Advantages

• High-capacity 64GB module for scalable memory expansion
• Ultra-fast DDR5 6400MT/s performance
• PC5-51200 standard for maximum bandwidth
• ECC support for improved data integrity
• Registered RDIMM for enhanced system stability
• 2Rx4 configuration for balanced performance

Ideal Use Cases

• Enterprise servers and data centers
• Cloud infrastructure and virtualization platforms
• High-performance computing (HPC)
• AI, analytics, and database servers
• Mission-critical business applications

Overview of Hynix HMCG94AHBRA488N Enterprise DDR5 ECC

The Hynix HMCG94AHBRA488N 64GB DDR5 6400MT/s PC5-51200 2Rx4 CL46 ECC Memory Module belongs to a high-performance enterprise memory category engineered for modern server and workstation platforms that demand exceptional bandwidth, capacity scalability, and data integrity. This category represents a critical component of next-generation computing infrastructure, where memory performance directly influences application efficiency, system responsiveness, and overall platform stability. Enterprise DDR5 ECC memory modules are designed to address the rapid evolution of processor architectures, which now feature higher core counts, wider memory channels, and increased parallelism.

Role of High-Speed ECC Memory in Modern Infrastructure

In contemporary data centers, memory plays a foundational role in determining system capability. The Hynix HMCG94AHBRA488N category supports workloads that require fast access to large datasets, consistent latency behavior, and continuous uptime. ECC memory is essential in these environments, providing protection against data corruption that could otherwise compromise system reliability. This category is widely adopted in enterprise servers, cloud platforms, high-performance computing systems, and professional workstations where stability and accuracy are as critical as raw speed.

Alignment With Enterprise and Hyperscale Requirements

Enterprise and hyperscale operators prioritize memory solutions that offer predictable behavior, long lifecycle support, and compatibility across multiple platform generations. The HMCG94AHBRA488N category meets these expectations by adhering to industry standards for DDR5 RDIMM-style ECC memory while leveraging Hynix manufacturing expertise to ensure consistent quality.

DDR5 Memory Technology and Architectural Evolution

DDR5 represents a significant evolution over previous DDR generations, introducing architectural changes that enhance bandwidth, efficiency, and scalability. The Hynix HMCG94AHBRA488N category takes full advantage of these innovations to deliver memory performance suitable for the most demanding enterprise workloads. Key improvements include higher base transfer rates, increased bank groups, and a restructured channel architecture that allows more efficient parallel data access. These enhancements collectively improve throughput and reduce contention within the memory subsystem.

Dual Independent Sub-Channel Architecture

Each DDR5 memory module is internally divided into two independent sub-channels, enabling concurrent memory operations within a single DIMM. The HMCG94AHBRA488N category benefits from this design by allowing the memory controller to manage requests more efficiently, improving overall utilization of available bandwidth. This sub-channel architecture is particularly beneficial in multi-core and multi-threaded environments, where numerous memory requests occur simultaneously.

Signal Integrity and High-Frequency Stability

Operating at 6400MT/s requires robust signal integrity and precise timing control. The Hynix HMCG94AHBRA488N category is engineered to maintain stable operation at high frequencies through advanced PCB design, optimized trace routing, and strict manufacturing tolerances. These design considerations ensure reliable data transmission even under sustained enterprise workloads.

6400MT/s Data Rate and PC5-51200 Bandwidth Performance

The defining performance characteristic of the Hynix HMCG94AHBRA488N category is its 6400MT/s data rate, delivering a PC5-51200 bandwidth classification. This translates to a theoretical peak bandwidth of 51.2GB/s per module, enabling servers to handle data-intensive operations with greater efficiency. High memory bandwidth is essential for modern processors that rely on rapid data movement to maintain high utilization across numerous cores. By providing ample bandwidth, this category helps eliminate memory-related performance constraints.

Bandwidth Scaling in Multi-Channel Server Architectures

Enterprise processors typically support multiple memory channels, allowing aggregate bandwidth to scale with the number of installed modules. The HMCG94AHBRA488N category is optimized for such configurations, ensuring consistent performance across all channels when deployed in balanced memory layouts. This scalability supports demanding workloads such as virtualization, analytics, simulation, and large-scale transaction processing.

Impact on Latency-Sensitive Applications

While bandwidth is a primary focus, latency behavior remains critical for many enterprise applications. DDR5 enhancements, combined with optimized timing characteristics such as CL46, help manage access latency while delivering high throughput. The HMCG94AHBRA488N category provides predictable latency performance that supports real-time processing and interactive workloads.

64GB Module Capacity and Memory Density Benefits

The 64GB capacity of the Hynix HMCG94AHBRA488N category enables high memory density within a single DIMM, allowing systems to scale total memory capacity efficiently. High-capacity modules reduce the number of DIMMs required to reach target memory sizes, simplifying system design and improving airflow. This density is particularly valuable in servers with limited DIMM slots or in configurations where maximizing memory per socket is essential.

Advantages and Cloud Platforms

Virtualization and cloud environments depend heavily on available memory to support multiple workloads concurrently. The HMCG94AHBRA488N category provides sufficient capacity to host numerous virtual machines or containers while maintaining performance isolation. High-capacity memory modules enable higher consolidation ratios, reducing hardware footprint and operational costs.

Support for In-Memory Databases and Analytics

In-memory databases and analytics platforms benefit significantly from large memory capacities that allow datasets to reside entirely in RAM. The 64GB capacity of this DDR5 ECC memory category supports such architectures, minimizing reliance on slower storage tiers. This capability accelerates query execution, data processing, and real-time analytics.

2Rx4 Memory Organization and Performance Characteristics

The 2Rx4 configuration of the Hynix HMCG94AHBRA488N category indicates a dual-rank module built with x4 DRAM devices. This organization is widely used in enterprise ECC memory because it balances performance, reliability, and compatibility with server memory controllers. Dual-rank designs allow the memory controller to interleave access between ranks, improving effective bandwidth and utilization.

x4 DRAM Devices and ECC

x4 DRAM devices are preferred in enterprise ECC memory because they enable stronger error correction capabilities. The HMCG94AHBRA488N category leverages x4 devices to ensure robust ECC operation, enhancing data integrity across the memory subsystem. This design is critical for applications where even minor data errors can have significant consequences.

Enterprise Memory Controllers

Most enterprise-grade processors are optimized for 2Rx4 ECC memory configurations. The Hynix HMCG94AHBRA488N category aligns with these expectations, ensuring broad compatibility and stable operation across supported platforms. This compatibility simplifies system integration and reduces configuration complexity.

CAS Latency CL46 and Timing

CAS latency is an important parameter that influences memory access timing. The CL46 rating of the Hynix HMCG94AHBRA488N category reflects the balance between high operating frequency and stable timing characteristics required for DDR5 memory at 6400MT/s. While higher frequencies generally result in higher absolute latency values, the increased bandwidth and architectural improvements of DDR5 help mitigate the impact on overall system performance.

Timing Stability Under Enterprise Workloads

Enterprise workloads often involve sustained memory access patterns that stress timing margins. The HMCG94AHBRA488N category is validated to maintain timing stability under continuous load, ensuring reliable operation in production environments. This stability contributes to predictable application behavior and system reliability.

Interaction Between Frequency and Latency

Memory performance is influenced by both frequency and latency. The high data rate of this DDR5 category compensates for higher CAS latency by delivering greater throughput per unit time, resulting in improved effective performance for bandwidth-sensitive applications. This balance is well suited to modern multi-core processors and data-intensive workloads.

ECC Functionality and Data Integrity Protection

Error-correcting code functionality is a defining feature of the Hynix HMCG94AHBRA488N category, providing essential protection against memory errors. ECC memory detects and corrects single-bit errors and identifies multi-bit errors, preventing silent data corruption. This level of protection is mandatory in enterprise environments where data accuracy and system stability are paramount.

Importance of ECC in Continuous Operation

Servers and critical systems often operate continuously for extended periods. Over time, memory errors can occur due to electrical noise, component aging, or environmental factors. ECC functionality in the HMCG94AHBRA488N category mitigates these risks, ensuring reliable long-term operation. This reliability is crucial for financial systems, healthcare applications, scientific computing, and other mission-critical workloads.

Integration With System Monitoring and RAS Features

ECC memory works in conjunction with processor and platform reliability, availability, and serviceability features. The Hynix HMCG94AHBRA488N category supports error reporting and monitoring mechanisms that allow administrators to track memory health and take proactive action. This integration enhances overall system resilience and maintainability.

Thermal Considerations

DDR5 memory introduces on-module power management to improve efficiency and stability. The Hynix HMCG94AHBRA488N category incorporates these features to deliver consistent performance while managing power consumption effectively. Efficient power delivery and thermal management are essential for maintaining reliability at high operating frequencies.

On-Module Voltage Regulation Benefits

By moving voltage regulation onto the memory module, DDR5 improves power delivery accuracy and reduces noise. The HMCG94AHBRA488N category benefits from this architecture, enabling stable operation at 6400MT/s. This design also simplifies motherboard power distribution and enhances overall system efficiency.

Thermal Stability in Dense Server Configurations

High-density server configurations can present thermal challenges. The Hynix HMCG94AHBRA488N category is designed to operate within enterprise thermal envelopes, maintaining performance without excessive heat generation. This stability supports reliable operation in data center environments with constrained cooling resources.

Manufacturing Quality and Hynix Enterprise Expertise

Hynix is a globally recognized leader in memory manufacturing, with extensive experience supplying enterprise-grade DRAM solutions. The HMCG94AHBRA488N category reflects this expertise through rigorous design, validation, and quality assurance processes. Each module is manufactured to meet strict enterprise standards, ensuring consistent performance and reliability.

Platform Qualification and Long-Term

Enterprise memory modules undergo extensive qualification across a wide range of server platforms. The Hynix HMCG94AHBRA488N category is designed to meet these requirements, supporting compatibility and interoperability. Long-term product availability and lifecycle management further enhance its suitability for enterprise deployments.

Foundation for Future Memory Scalability

As enterprise workloads continue to grow in complexity and scale, memory subsystems must evolve accordingly. The high-speed DDR5 architecture, large capacity, and robust ECC features of the Hynix HMCG94AHBRA488N category provide a future-ready foundation for next-generation computing platforms. This category enables organizations to build scalable, reliable, and high-performance systems capable of supporting emerging technologies and evolving business demands.