HMCG78MEBRA103N Hynix 16GB (1x16gb) DDR5 4800MHz PC5-38400 1RX8 ECC RAM

Hynix HMCG78MEBRA103N 16GB Server Memory Module

The Hynix HMCG78MEBRA103N features a substantial 16GB memory capacity organized as a single 16GB module (1x16GB). This configuration provides optimal flexibility for server installations where individual DIMM slots may need to be populated gradually or when specific memory channel configurations are required. The 1Rx8 organization indicates a single rank of memory with eight internal banks, optimizing signal integrity and access patterns for server workloads.

Performance Characteristics

Operating at 4800MT/s (MegaTransfers per second), this DDR5 module delivers significant bandwidth improvements over previous DDR4 generations. The PC5-38400 designation confirms the module's peak transfer rate of 38,400 MB/s. With a CAS Latency of CL40 and operating voltage of 1.1V, this memory achieves an optimal balance between performance and power efficiency, making it suitable for energy-conscious data center environments while maintaining robust performance characteristics.

Advanced DDR5 Architecture

DDR5 Technological Advancements

The HMCG78MEBRA103N leverages the revolutionary DDR5 architecture featuring a burst length of 16, doubling the prefetch capabilities of DDR4. This enhancement significantly improves data transfer efficiency and reduces memory access latency. The implementation of two independent 40-bit subchannels (32 data bits with 8 ECC bits each) per DIMM creates a more efficient data pathway, effectively functioning as dual-channel operation within a single memory module.

On-Die ECC and Error Correction

This module incorporates advanced On-Die ECC (Error Correction Code) circuitry that automatically detects and corrects bit errors within the DRAM chips themselves. This first layer of error protection works in conjunction with the traditional ECC functionality to provide comprehensive data integrity protection, crucial for mission-critical server applications where data corruption cannot be tolerated.

Server-Specific Features

ECC and Registered DIMM Technology

As an RDIMM (Registered Dual In-line Memory Module), the HMCG78MEBRA103N incorporates registered buffers that reduce the electrical load on the server's memory controller. This buffering enables support for higher memory capacities per channel and improves signal integrity in systems with large memory configurations. The registered design makes this module particularly suitable for servers requiring substantial memory expansion capabilities and enhanced reliability.

Comprehensive Error Correction

The module implements full ECC (Error Correcting Code) capability with single-bit error correction and double-bit error detection. This advanced error correction ensures data integrity by automatically identifying and correcting memory errors in real-time, providing essential protection against soft errors and maintaining system stability in 24/7 server environments.

Module Dimensions and Interface

The HMCG78MEBRA103N utilizes the standard 288-pin DDR5 DIMM form factor with a length of 133.35mm and height typically around 31.25mm. The module features a single notch position that is specific to DDR5 technology, preventing accidental insertion into incompatible DDR4 slots. The gold-plated contact fingers ensure reliable electrical connections and corrosion resistance for long-term server deployment.

Application Scenarios

Server Workload Optimization

The Hynix HMCG78MEBRA103N delivers exceptional performance for diverse server workloads including database management systems, virtualization platforms, and enterprise resource planning applications. The 4800MT/s data rate combined with DDR5's improved efficiency provides substantial bandwidth for memory-intensive operations, reducing processing bottlenecks and improving overall server responsiveness.

Cloud and Data Center Deployment

This memory module is ideally suited for cloud computing infrastructure and large-scale data center deployments. The ECC functionality ensures data integrity across multi-tenant environments. The module's reliability characteristics make it appropriate for servers requiring high availability and minimal downtime.

Memory Chip Organization

The HMCG78MEBRA103N utilizes high-quality DDR5 SDRAM chips organized in a 1Rx8 configuration. This organization means the module contains a single rank of memory chips with eight internal banks, optimizing memory access patterns and command efficiency. The advanced chip architecture supports bank grouping and same-bank refresh commands that improve overall memory efficiency.

Signal Integrity Enhancements

DDR5 technology in this module incorporates improved signal integrity features including Decision Feedback Equalization (DFE) on the data bus. This advanced signal processing technique compensates for channel losses and inter-symbol interference, enabling higher data rates with improved reliability. The implementation of on-DIMM power management with PMIC (Power Management Integrated Circuit) provides more stable voltage regulation compared to motherboard-based power delivery in previous generations.

Server Platform Compatibility

The Hynix HMCG78MEBRA103N is designed for compatibility with server platforms supporting DDR5 technology, including next-generation Intel Xeon Scalable processors and AMD EPYC server platforms. The RDIMM form factor ensures compatibility with servers designed for registered memory, typically found in workstation and enterprise server configurations rather than consumer desktop systems.

Power Efficiency

The module operates at a nominal voltage of 1.1V, representing a significant reduction from DDR4's 1.2V operation, contributing to improved power efficiency in server environments. The integrated Power Management IC (PMIC) on the DIMM itself provides more precise voltage regulation to the DRAM chips, enhancing signal integrity and enabling better power distribution across the memory module compared to motherboard-based power regulation.

Performance Optimization

For optimal performance, populate memory channels symmetrically according to the server manufacturer's guidelines. The 4800MT/s data rate may require specific BIOS settings to achieve, particularly in multi-DIMM per channel configurations. Monitor system memory performance using available diagnostic tools to verify the module is operating at its rated specifications within the server environment.