HMCG78AHBRA471N Hynix 16GB PC5-51200 DDR5-6400MT/s 1Rx8 ECC Memory

Hynix HMCG78AHBRA471N 16GB Memory Kit

The Hynix HMCG78AHBRA471N represents a significant advancement in server memory technology, delivering exceptional performance, reliability, and efficiency for modern data center environments. This 16GB DDR5 RDIMM module is engineered to meet the rigorous demands of enterprise servers, cloud computing infrastructure, and high-performance computing applications.

Key Specifications at a Glance

This memory module operates at a blazing-fast speed of 6400 MT/s (MegaTransfers per second), corresponding to a PC5-51200 classification. It utilizes a single 16GB DRAM component organized as a single rank with x8 data width. The module operates at a low voltage of 1.1V while incorporating ECC (Error Correcting Code) and Registered technology for enhanced data integrity and stability in mission-critical environments.

Memory Capacity

The Hynix HMCG78AHBRA471N provides a substantial 16GB capacity in a single module configuration. This capacity is ideal for balancing memory density with performance requirements in various server configurations. The single-rank design optimizes signal integrity and allows for higher operating frequencies compared to dual-rank modules of similar capacity.

Single Rank Architecture Benefits

The single-rank configuration enables more efficient memory access patterns and reduces electrical load on the memory controller. This design choice allows the module to achieve its rated 6400 MT/s speed while maintaining stability. For server administrators, this means predictable performance and the ability to populate more modules per channel without exceeding the controller's electrical limitations.

X8 DRAM Device Organization

The x8 organization refers to the internal structure of the DRAM chips, where each chip has an 8-bit data interface. This configuration provides an optimal balance between performance, power efficiency, and reliability. The x8 design enhances signal integrity by distributing the electrical load across more chips compared to x4 organization, while still maintaining robust error correction capabilities.

Performance Characteristics

6400 MT/s Data Rate

Operating at 6400 MegaTransfers per second, this DDR5 module delivers substantially higher bandwidth compared to previous generation DDR4 memory. This increased data rate translates to faster application response times, improved virtualization performance, and enhanced throughput for data-intensive workloads. The PC5-51200 designation confirms compliance with JEDEC standards for this performance tier.

CAS Latency CL46 Timing

The CAS Latency of CL46 represents the number of clock cycles between a read command and the availability of the first piece of data. While higher in absolute terms compared to DDR4 due to the increased clock speeds of DDR5, this latency is optimized for the architecture to deliver exceptional real-world performance in server environments where sustained bandwidth is often more critical than absolute latency.

Timing Optimization for Server Workloads

The CL46 timing is specifically tuned for server applications that benefit from high bandwidth and consistent performance under load. This timing configuration ensures stable operation across varying temperatures and usage scenarios typical in 24/7 server environments, providing the reliability demanded by enterprise and data center applications.

Advanced Memory Technologies

ECC (Error Correcting Code) Implementation

The Hynix HMCG78AHBRA471N incorporates sophisticated ECC technology that detects and corrects single-bit errors in real-time. This capability is crucial for maintaining data integrity in mission-critical systems where even minor memory errors could lead to data corruption, system crashes, or computational errors. The ECC implementation goes beyond simple error detection to actively correct errors without impacting performance.

On-Die ECC Innovation

DDR5 architecture introduces on-die ECC, which operates within each DRAM chip to correct errors before they reach the memory bus. This additional layer of protection complements the traditional module-level ECC, creating a comprehensive error correction system that significantly enhances reliability compared to previous memory generations.

Registered DIMM (RDIMM) Architecture

As a Registered DIMM, this module includes a register between the memory controller and the DRAM chips. This register buffers command and address signals, reducing the electrical load on the memory controller and enabling support for higher module densities and more modules per memory channel. This architecture is essential for scalable server configurations requiring large memory capacities.

Benefits of Registered Architecture

The registered design improves signal integrity, especially in systems with multiple memory modules installed. By reducing the electrical burden on the memory controller, RDIMMs enable more stable operation at higher speeds and greater memory capacities compared to unbuffered modules. This makes them the preferred choice for servers and workstations where reliability and capacity are paramount.

Power Efficiency

The module operates at a remarkably low 1.1V, representing a significant reduction from DDR4's 1.2V standard operating voltage. This voltage reduction translates directly to lower power consumption and reduced heat generation, contributing to improved energy efficiency in data center environments where power and cooling costs represent substantial operational expenses.

288-Pin RDIMM Form Factor

This module utilizes the standard 288-pin RDIMM form factor defined by JEDEC for DDR5 server memory. The physical dimensions and pinout comply with industry standards to ensure broad compatibility with DDR5 server platforms. The keying notch position prevents accidental installation in incompatible sockets.

Server Platform Compatibility

The Hynix HMCG78AHBRA471N is designed for compatibility with server platforms supporting DDR5 memory technology. This includes next-generation server processors and chipsets from major manufacturers. The module's SPD (Serial Presence Detect) contains programming that enables automatic configuration for compatible systems.

Application Scenarios and Use Cases

Data Center and Enterprise Server Deployment

This memory module is ideally suited for general-purpose servers in enterprise and data center environments. Its balance of capacity, speed, and reliability makes it appropriate for a wide range of server applications including file serving, web hosting, and business application hosting.

Virtualization Host Platforms

The high bandwidth and reliability characteristics of the Hynix HMCG78AHBRA471N make it particularly well-suited for virtualization hosts running multiple virtual machines. The ECC protection ensures data integrity across virtualized workloads, while the high bandwidth supports memory-intensive virtualization scenarios.

High-Performance Computing Applications

For technical computing, scientific research, and engineering applications, the combination of high bandwidth and ECC protection provides the performance and accuracy required for computationally intensive tasks. The module's characteristics support applications where both speed and data integrity are critical.

Database Server Implementation

Database servers benefit significantly from the high bandwidth and reliability features of this memory module. The fast data access speeds improve query performance, while ECC protection safeguards against data corruption in critical database operations, ensuring business continuity and data integrity.

DDR5 Architectural Advancements

The Hynix HMCG78AHBRA471N leverages several key DDR5 architectural improvements over previous generations. These include doubled burst length, improved bank groups, and separate address/command buses, all contributing to significantly higher performance and efficiency in server workloads.