HMCG88AHBRA476N Hynix 32GB PC5-51200 DDR5-6400MHz SDRAM 2Rx8 ECC Registered Memory Module

Hynix 32GB DDR5 ECC Memory Module

The Hynix HMCG88AHBRA476N is a high-performance 32GB DDR5 SDRAM memory module engineered for enterprise-grade servers and workstations. Designed with advanced ECC and registered features, it ensures stability, reliability, and speed for demanding workloads.

General Information

• Brand: Hynix
• Model Number: HMCG88AHBRA476N
• Device Category: 32GB DDR5 SDRAM Registered Memory

Technical Specifications

Core Features

• Capacity: 32GB
• Memory Type: DDR5 SDRAM
• Module Count: 1 x 32GB

Performance Attributes

• Bus Speed: 6400MT/s DDR5-6400 / PC5-51200
• Error Correction: ECC (Error-Correcting Code)
• Signal Type: Registered
• Latency: CL46
• Rank Configuration: 2Rx8

Physical Characteristics

Design & Build

• Form Factor: 288-pin RDIMM
• Dimensions: Height 1.00 in x Depth 6.75 in
• Weight: 0.20 lb

Compatibility

Supported Systems

Compatible Models Include:

• PowerEdge C6620
• PowerEdge HS5610
• PowerEdge HS5620
• PowerEdge MX760c
• PowerEdge R660
• PowerEdge R660xs
• PowerEdge R770
• PowerEdge R760xa
• PowerEdge R760xd2
• PowerEdge R760xs
• PowerEdge T550

HMCG88AHBRA476N 32GB DDR5 SDRAM Memory Overview

The Hynix HMCG88AHBRA476N 32GB PC5-51200 DDR5-6400MHz SDRAM 2Rx8 ECC Registered Memory Module belongs to the high-performance enterprise-grade DDR5 registered memory category designed for modern server, workstation, and data center environments. This category encompasses memory modules engineered to meet stringent requirements for reliability, scalability, signal integrity, and sustained throughput under continuous workloads. DDR5 registered DIMMs represent a foundational component for next-generation computing platforms that demand higher memory bandwidth, improved power efficiency, and robust error correction capabilities.

Within this category, memory modules are optimized for multi-socket server architectures, virtualization platforms, cloud infrastructure, artificial intelligence workloads, and large-scale databases. The focus is on delivering consistent performance across dense memory configurations while maintaining data integrity and thermal stability. The Hynix HMCG88AHBRA476N exemplifies these principles by integrating advanced DDR5 signaling, registered buffering, and ECC functionality into a single enterprise-focused solution.

DDR5 SDRAM Architecture and Advancements

DDR5 SDRAM represents a substantial evolution from previous DDR4 generations, introducing architectural enhancements that directly impact performance and efficiency. Modules such as the Hynix HMCG88AHBRA476N operate at a base speed of 6400MHz, corresponding to the PC5-51200 specification, which enables significantly higher memory bandwidth per channel. This increased bandwidth supports data-intensive workloads by reducing latency bottlenecks between processors and memory subsystems.

DDR5 memory introduces a dual-channel architecture per DIMM, effectively splitting the module into two independent 32-bit subchannels. This design improves memory access efficiency, increases parallelism, and enhances overall system responsiveness. In enterprise systems utilizing registered memory modules, these architectural changes translate into improved throughput for simultaneous workloads such as transactional databases, virtualization clusters, and real-time analytics engines.

On-Die ECC and External ECC Synergy

DDR5 technology incorporates on-die error correction to improve manufacturing yields and internal data reliability. When combined with external ECC mechanisms present in registered DIMMs, the result is a layered approach to error detection and correction. The Hynix HMCG88AHBRA476N leverages this synergy to provide robust protection against single-bit and multi-bit memory errors, ensuring data integrity across mission-critical applications.

Registered DIMM Design and Signal Integrity

Registered memory modules, commonly referred to as RDIMMs, include a register or buffer that sits between the memory controller and the DRAM chips. This register reduces the electrical load on the memory controller by re-driving command and address signals. In high-density configurations, such as servers populated with multiple memory modules per channel, this design is essential for maintaining stable operation.

The Hynix HMCG88AHBRA476N utilizes registered buffering to enable higher memory capacities per system without compromising signal integrity. This makes it particularly suitable for enterprise servers that require large memory footprints to support virtualization, in-memory computing, and large-scale data processing. The registered architecture also contributes to improved timing margins, allowing the module to operate reliably at high frequencies like DDR5-6400MHz.

2Rx8 Memory Organization

The 2Rx8 configuration of this module indicates a dual-rank layout using x8 DRAM devices. Dual-rank memory can improve performance by allowing the memory controller to interleave accesses between ranks, effectively increasing throughput under certain workloads. This configuration is commonly favored in enterprise environments where balanced performance and capacity are critical.

The x8 DRAM organization aligns with ECC requirements by allowing an additional DRAM chip per rank to store parity information. This structural design supports advanced error correction while maintaining compatibility with server-class memory controllers.

Error Correction Code Functionality in Enterprise Systems

ECC registered memory is a defining feature of enterprise computing platforms. The ECC capability of the Hynix HMCG88AHBRA476N enables real-time detection and correction of single-bit memory errors and detection of multi-bit errors. This functionality is critical in environments where data accuracy and system uptime are paramount, such as financial systems, healthcare platforms, scientific research, and cloud infrastructure.

By continuously monitoring memory transactions, ECC reduces the risk of data corruption, system crashes, and silent data errors. Over long operational periods, especially in systems running 24/7 workloads, ECC memory significantly enhances system reliability and reduces maintenance costs associated with unexpected failures.

Impact on Virtualization and Cloud Workloads

Virtualized environments place heavy demands on memory subsystems due to simultaneous access from multiple virtual machines. ECC registered DDR5 modules help maintain consistent performance and stability under these conditions. The Hynix HMCG88AHBRA476N supports dense virtualization deployments by ensuring that memory errors do not propagate across virtual instances, preserving isolation and reliability.

Key Characteristics of PC5-51200 DDR5-6400MHz

The PC5-51200 rating corresponds to a theoretical peak bandwidth of 51.2GB/s per module. This high throughput is essential for modern processors with increasing core counts and parallel execution capabilities. When paired with CPUs supporting DDR5 memory, modules in this category allow systems to fully utilize processor resources without being constrained by memory bandwidth limitations.

High-frequency DDR5 memory also improves responsiveness for workloads that rely on rapid data access, including real-time analytics, machine learning inference, and high-performance computing simulations. The Hynix HMCG88AHBRA476N is engineered to deliver consistent performance at its rated speed while adhering to enterprise thermal and power specifications.

Latency and Timing Considerations

While DDR5 introduces higher base latencies compared to earlier generations, the increased bandwidth and architectural efficiencies often result in improved real-world performance. Registered DIMMs are optimized to balance latency with stability, ensuring predictable performance across a wide range of workloads. This balance is particularly important in database-driven applications and transactional systems where consistent response times are required.

Power Management and Efficiency Enhancements

DDR5 memory introduces on-module power management through an integrated power management IC. This shift from motherboard-based regulation to module-level regulation improves voltage stability and power efficiency. The Hynix HMCG88AHBRA476N benefits from this design by achieving more precise voltage control, reducing power fluctuations, and enhancing overall system efficiency.

Improved power efficiency is critical in data center environments where energy consumption and thermal output directly impact operational costs. DDR5 registered modules help reduce total cost of ownership by lowering power draw per gigabyte while supporting higher capacities and performance levels.

Thermal Characteristics in High-Density Systems

Enterprise memory modules are designed to operate within defined thermal envelopes even in densely populated server chassis. The Hynix HMCG88AHBRA476N is manufactured using advanced semiconductor processes that optimize thermal performance. This allows the module to sustain high data rates without excessive heat generation, contributing to system stability and longevity.

Compatibility with Modern Server Platforms

This category of DDR5 ECC registered memory is intended for use with server and workstation platforms that support DDR5 RDIMMs. Compatibility extends to modern CPU architectures designed to leverage the increased bandwidth and capacity of DDR5 memory. The Hynix HMCG88AHBRA476N adheres to JEDEC standards, ensuring interoperability with compliant systems and motherboards.

System integrators and IT professionals rely on standardized memory modules to simplify deployment and maintenance. JEDEC compliance ensures that the module operates within defined electrical and timing parameters, reducing the risk of incompatibility or instability during system upgrades or expansions.

Future-Proofing with DDR5 Memory Technology

As software and hardware ecosystems continue to evolve, memory requirements are expected to increase in both capacity and bandwidth. DDR5 registered memory modules represent a forward-looking investment that aligns with emerging computing trends. The Hynix HMCG88AHBRA476N provides a foundation for systems designed to handle future workloads without immediate hardware replacement.

Adoption of DDR5 memory enables organizations to take advantage of new processor architectures, faster interconnects, and more sophisticated workload orchestration. By selecting enterprise-grade modules within this category, system builders ensure long-term compatibility and performance scalability.