HMCG78AGBRA191N Hynix 16GB 5600MHz PC5-44800 Ecc Registered Cl46 DDR5 SDRAM 288-pin RDIMM RAM

Hynix HMCG78AGBRA191N 16GB Memory Kit

The Hynix HMCG78AGBRA191N represents the pinnacle of server-grade memory technology, designed specifically for enterprise environments where stability, performance, and reliability are non-negotiable. This 16GB DDR5 module incorporates advanced error correction, signal integrity features, and power efficiency optimizations that distinguish server memory from conventional desktop RAM. Understanding the technical specifications and architectural advantages of this memory category is essential for IT professionals building and maintaining mission-critical server infrastructure.

DDR5 Server Memory Architecture

DDR5 technology represents a fundamental shift in memory architecture, offering significant improvements over previous generations. The Hynix HMCG78AGBRA191N leverages these advancements to deliver enhanced performance while maintaining the robust reliability requirements of server environments.

Core DDR5 Technological Advancements

DDR5 introduces several architectural changes that differentiate it from DDR4, including a redesigned command/address bus, improved power management, and enhanced signal integrity. These improvements collectively contribute to the higher data rates and improved efficiency that modern server workloads demand.

On-Die ECC Implementation

Unlike previous generations, DDR5 incorporates on-die ECC (Error Correcting Code) as a standard feature. This additional layer of error correction operates within the DRAM die itself, correcting bit errors before they can propagate to the system level. This complements the module-level ECC provided by registered DIMMs, creating a comprehensive error protection scheme.

Module-Level Power Distribution

The Hynix HMCG78AGBRA191N incorporates an onboard PMIC that efficiently regulates power delivery directly on the module. This localization of power management reduces noise, improves signal integrity, and provides more stable voltage to the DRAM components, which is particularly important in dense server configurations where power delivery challenges are amplified.

Server-Specific Memory Features

Server memory modules incorporate specialized features that distinguish them from consumer-grade memory, focusing on reliability, scalability, and manageability in demanding 24/7 operational environments.

Registered DIMM (RDIMM) Architecture

The Hynix HMCG78AGBRA191N is implemented as a Registered DIMM (RDIMM), which incorporates a register between the memory controller and the DRAM modules. This architecture provides crucial benefits for server memory subsystems.

Signal Integrity and Loading Advantages

The register buffer on RDIMMs reduces the electrical load on the memory controller by presenting a single load instead of multiple DRAM loads. This signal buffering enables support for higher memory capacities per channel and improves signal integrity at higher data rates, which is essential for maintaining stability in servers with large memory configurations.

Reliability Benefits

By reducing the electrical load on the memory controller, RDIMM architecture allows servers to support more memory modules per channel and higher overall memory capacities. This scalability is essential for memory-intensive server applications such as databases, virtualization hosts, and in-memory computing platforms where maximum memory capacity is a critical requirement.

Error Correcting Code (ECC) Implementation

The Hynix HMCG78AGBRA191N incorporates robust ECC capabilities that provide essential data protection for mission-critical server applications. ECC functionality detects and corrects single-bit errors and detects multi-bit errors, preventing data corruption and system crashes.

Single Bit Error Correction

ECC memory can automatically detect and correct single-bit errors that occur during memory operations. This capability is crucial for maintaining data integrity in applications where even minor data corruption could have significant consequences, such as financial transactions, scientific computations, or database operations.

Multi-Bit Error Detection

While ECC can typically only correct single-bit errors, it can detect multi-bit errors, allowing the system to take appropriate action before corrupted data is used. This detection capability provides an additional layer of protection against more significant memory failures that could lead to system instability or data loss.

Key Specifications

Understanding the detailed specifications of the Hynix HMCG78AGBRA191N is essential for proper integration into server infrastructure and ensuring compatibility with existing systems.

Capacity

The Hynix HMCG78AGBRA191N provides 16GB of memory capacity organized in a single-rank configuration with an x8 DRAM device organization. This specific organization optimizes the module for performance and compatibility in various server platforms.

Single Rank Architecture (1Rx8)

The 1Rx8 designation indicates that the module is organized as a single rank with x8 DRAM devices. This configuration means that all memory chips on the module are accessed simultaneously during a memory operation. Single-rank modules typically offer better performance in certain configurations compared to dual-rank or quad-rank modules, particularly when populating multiple channels per processor.

16GB Capacity Optimization

The 16GB capacity represents an optimal balance for many server workloads, providing substantial memory resources while maintaining compatibility with a wide range of server platforms. This capacity is well-suited for applications ranging from virtualized environments to database servers and enterprise applications where memory capacity needs to be balanced with performance requirements.

Performance Characteristics

The performance specifications of the Hynix HMCG78AGBRA191N define its capabilities in handling demanding server workloads and data-intensive applications.

Data Rate Specifications

With a data rate of 5600 MT/s (MegaTransfers per second), this memory module provides substantial bandwidth improvement over previous generation DDR4 memory. The increased data rate enables faster data access and improved overall system performance for memory-bound applications. The PC5-44800 designation refers to the peak bandwidth of 44800 MB/s per module, calculated as 5600 MT/s × 8 bytes (64-bit) = 44800 MB/s.

Timing Parameters and Latency

The CL46 timing specification indicates a CAS latency of 46 clock cycles. While this absolute latency value appears higher than DDR4 timings, the faster clock speed of DDR5 results in actual nanosecond latency that is comparable or improved. The timing parameters are carefully optimized to balance performance with stability and reliability in server environments where consistent operation is more critical than absolute minimum latency.

Physical and Electrical Specifications

The physical design and electrical characteristics of the Hynix HMCG78AGBRA191N ensure proper mechanical fit, thermal performance, and electrical compatibility with server platforms.

288-Pin DIMM Form Factor

The module utilizes the standard 288-pin DDR5 DIMM form factor with a specific keying notch position that prevents installation in incompatible DDR4 slots. The physical dimensions conform to industry standards, ensuring proper mechanical compatibility with server memory slots and retention mechanisms. The pinout is specifically designed for DDR5's enhanced signaling and power delivery requirements.

Power Efficiency

Operating at 1.1V, the Hynix HMCG78AGBRA191N provides improved power efficiency compared to previous memory generations. The reduced operating voltage contributes to lower power consumption and reduced heat generation, which is particularly important in high-density server configurations where thermal management and power efficiency are critical design considerations.

Server Platform Compatibility

The Hynix HMCG78AGBRA191N is designed for compatibility with server platforms that support DDR5 registered DIMMs. Compatibility depends on multiple factors including processor generation, chipset support, and BIOS/firmware requirements.

Application and Use Case Scenarios

The Hynix HMCG78AGBRA191N is engineered to excel in various server application scenarios where reliability, capacity, and performance are critical requirements.

Enterprise Server Applications

This memory module is ideally suited for traditional enterprise server workloads that demand high reliability and consistent performance under varying load conditions.

Database and Transaction Processing

Database servers and online transaction processing (OLTP) systems benefit from the combination of capacity, bandwidth, and ECC protection provided by the Hynix HMCG78AGBRA191N. These applications typically involve frequent memory access and require maximum data integrity, making the reliability features of server-grade memory essential for maintaining data consistency and system availability.

Virtualization and Cloud Infrastructure

Virtualization hosts and cloud infrastructure platforms require substantial memory capacity with high reliability to support multiple virtual machines simultaneously. The 16GB capacity per module provides flexible configuration options for building servers with large memory footprints, while the ECC and registered DIMM architecture ensure stable operation in consolidated environments where memory errors could affect multiple workloads.

Specialized Computing Applications

Beyond traditional enterprise applications, the Hynix HMCG78AGBRA191N addresses the requirements of specialized computing environments with particular memory subsystem demands.

High-Performance Computing

In high-performance computing (HPC) environments, the balance of bandwidth, capacity, and reliability provided by this memory module supports complex computational workloads. While HPC applications often prioritize bandwidth, the ECC capabilities remain essential for ensuring the integrity of computational results in scientific, engineering, and research applications.

In-Memory Computing Platforms

In-memory computing platforms and real-time analytics applications that maintain large datasets in system memory benefit from the capacity and performance characteristics of the Hynix HMCG78AGBRA191N. These applications require fast memory access with high reliability to support real-time processing of large datasets while maintaining data consistency and system responsiveness.