SK hynix 16GB DDR5-4800 ECC RDIMM Server Memory Module HMCG78AEBRA

Brand: SK Hynix | Category: Memory (RAM)

SKU: HMCG78AEBRA | Part #: HMCG78AEBRA | MPN: HMCG78AEBRA

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Product Overview

The SK hynix 16GB DDR5-4800 ECC RDIMM is a high-performance, enterprise-grade server memory module engineered to meet the demanding requirements of modern data centres, cloud computing environments, and mission-critical enterprise applications. As the memory industry transitions to the DDR5 standard, this module represents a generational leap in bandwidth, capacity scalability, and energy efficiency compared to DDR4 predecessors.

DDR5 technology introduces a fundamentally redesigned memory architecture that doubles the burst length, integrates on-die ECC (Error Correction Code) at the chip level, and delivers dramatically improved memory bandwidth — all while operating at lower core voltages. The RDIMM (Registered DIMM) form factor adds a register component between the memory controller and DRAM chips, enabling greater electrical stability at higher speeds and supporting larger memory configurations per channel, which is essential for scale-out enterprise deployments.

Manufactured by SK hynix — one of the world's leading DRAM producers — this module carries the reliability, yield quality, and long-term availability commitments that enterprise IT procurement teams and system integrators demand. Whether you are refreshing an existing server fleet or building a new high-density compute cluster, the HMCG78AEBRA provides a certified, production-grade solution designed to integrate seamlessly into supported server platforms.

Key Features & Benefits

• DDR5-4800 Speed Grade: Operates at 4800 MT/s, delivering substantially higher peak bandwidth than DDR4-3200 modules, reducing memory bottlenecks in bandwidth-intensive applications such as in-memory databases, AI inference, and HPC workloads.
• 16GB Capacity per Module: Provides a practical, cost-efficient density for single-socket and dual-socket servers, enabling total system memory configurations from 32GB to several terabytes depending on platform DIMM slot count.
• ECC (Error Correction Code) Protection: Detects and corrects single-bit memory errors in real time, protecting data integrity across long-running enterprise workloads and preventing silent data corruption in financial, scientific, and database applications.
• Registered (RDIMM) Design: The on-module register buffers command and address signals, reducing electrical load on the memory controller and enabling higher DIMM counts per channel — critical for memory-dense server builds.
• On-Die ECC (ODECC): DDR5 introduces a secondary layer of ECC implemented within each DRAM die itself, providing protection against bit errors before data even reaches the system-level ECC logic, significantly improving overall reliability.
• Lower Operating Voltage: DDR5 operates at 1.1V compared to DDR4's 1.2V, reducing power consumption per module and contributing to lower overall system thermal output — an important consideration in high-density rack deployments.
• Brand New Condition: Supplied as a factory-sealed, original SK hynix unit with no previous use, ensuring full manufacturer-specified performance and longevity from first deployment.
• Industry-Standard Form Factor: 288-pin DIMM form factor compatible with DDR5 RDIMM slots on supported Intel Xeon Scalable (4th Gen and later) and AMD EPYC (Genoa and later) platforms.

Technical Architecture

DDR5 represents the most significant architectural revision to DRAM in over a decade. At the module level, DDR5 RDIMMs feature two independent 32-bit subchannels per module (compared to DDR4's single 64-bit channel), effectively doubling the number of memory access operations that can be initiated per clock cycle and improving memory controller scheduling efficiency.

The HMCG78AEBRA is built on SK hynix's advanced DRAM fabrication process, leveraging high-density cell architecture to achieve 16GB capacity in a standard DIMM form factor. The registered design incorporates a Register Clock Driver (RCD) compliant with JEDEC DDR5 RCD01/RCD02 specifications, which buffers the command, address, and clock signals originating from the host memory controller. This buffering reduces signal integrity challenges at high frequencies and allows platforms to populate more DIMMs per memory channel without sacrificing timing margins.

On-die ECC operates transparently within each DRAM die, correcting errors at the chip level before they propagate to the system bus. Combined with the host platform's system-level ECC, this dual-layer error correction architecture significantly reduces the uncorrectable bit error rate (UBER) in production environments. The module also incorporates a Serial Presence Detect (SPD) component that stores timing parameters, voltage specifications, and manufacturer identification data, allowing the host system BIOS/UEFI to automatically configure optimal memory timings during POST.

Performance & Capacity

At DDR5-4800, each module delivers a peak theoretical bandwidth of approximately 38.4 GB/s per module. In a dual-channel configuration (two modules), aggregate bandwidth approaches 76.8 GB/s, and in fully populated multi-channel server platforms (8-channel configurations such as those found in 4th Gen Intel Xeon Scalable systems), total memory bandwidth can exceed 300 GB/s — a dramatic improvement over equivalent DDR4 configurations.

The 16GB capacity per module allows system architects to scale memory configurations according to workload requirements. In a typical 2-socket server with 16 DIMM slots per socket (32 slots total), full population with 16GB RDIMMs yields 512GB of total system memory — more than sufficient for most virtualisation, database, and analytics workloads. For workloads requiring higher per-socket capacity, this module can be mixed with higher-density DDR5 RDIMMs on platforms that support mixed-capacity configurations.

Latency characteristics of DDR5-4800 are optimised at the architecture level, with improvements in burst access patterns and prefetch logic that benefit sequential-read-heavy workloads such as data warehousing, streaming analytics, and large language model (LLM) inference. Write latency remains competitive for transactional database workloads, making the module suitable for both read-intensive and write-intensive enterprise applications.

Compatibility & Integration

The SK hynix HMCG78AEBRA is designed for deployment in server platforms equipped with DDR5 RDIMM memory slots. Primary compatible processor ecosystems include:

• Intel Xeon Scalable 4th Generation (Sapphire Rapids) and 5th Generation (Emerald Rapids): These platforms natively support DDR5-4800 RDIMMs and are the primary target deployment environment for this module.
• AMD EPYC 9004 Series (Genoa) and 9005 Series (Turin): AMD's Zen 4 and Zen 5 based EPYC processors support DDR5 memory with 12-channel memory controllers, providing exceptional aggregate bandwidth when combined with DDR5 RDIMMs.
• JEDEC DDR5 Standard Compliance: The module is compliant with JEDEC DDR5 SDRAM standards, ensuring interoperability with any platform that adheres to the DDR5 RDIMM specification.
• Operating System Support: Compatible with all major enterprise operating systems including Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESXi, Microsoft Windows Server 2022 and later, and major hypervisor platforms.
• Server OEM Compatibility: Suitable for use in servers from leading OEMs including Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem, Supermicro, and Inspur platforms that support DDR5 RDIMM memory.

Ideal Use Cases

• AI & Machine Learning Inference: High memory bandwidth is critical for loading large model weights and activating neural network layers rapidly. DDR5-4800 significantly reduces the memory bottleneck in CPU-based inference pipelines and in GPU-accelerated servers where system DRAM feeds data to accelerators.
• Virtualisation & Private Cloud: Dense VM environments require large, fast memory pools to support hundreds of concurrent virtual machines. The combination of 16GB capacity, ECC protection, and high bandwidth makes this module ideal for VMware vSphere, Microsoft Hyper-V, and KVM-based virtualisation hosts.
• In-Memory Databases & Analytics: Platforms such as SAP HANA, Redis, Apache Ignite, and Oracle TimesTen rely on keeping entire datasets in DRAM for sub-millisecond query response times. DDR5 bandwidth improvements directly translate to higher query throughput and lower latency.
• High-Performance Computing (HPC): Scientific simulation, computational fluid dynamics, genomics processing, and financial risk modelling all benefit from maximum memory bandwidth. DDR5-4800 RDIMMs provide the bandwidth density that HPC cluster nodes require.
• OLAP & Data Warehousing: Columnar database engines and business intelligence platforms that scan large datasets benefit directly from the improved sequential read bandwidth of DDR5, enabling faster report generation and ad-hoc analytics.
• Cloud Infrastructure & Hyperscale Compute: Cloud service providers and colocation operators building high-density compute nodes can leverage DDR5's improved power efficiency to reduce per-VM energy costs while increasing workload density per rack unit.
• Edge Computing & Telco NFV: Network Function Virtualisation deployments at the edge require reliable, high-bandwidth memory with ECC protection to ensure carrier-grade uptime for virtualised network functions running on COTS server hardware.

Why Buy from Omnixon

Omnixon Global is a trusted B2B IT hardware distributor headquartered in Dubai, UAE, serving enterprise clients across the GCC region and internationally. Our inventory of SK hynix DDR5 server memory modules is stocked locally, enabling rapid fulfilment for organisations across the UAE, Saudi Arabia, Qatar, Kuwait, Bahrain, Oman, and beyond. We specialise in supporting enterprise IT teams, data centre operators, system integrators, and government technology programmes with genuine, brand-new hardware sourced through authorised supply channels. Our technical team can assist with memory compatibility validation, configuration guidance, and bill-of-materials support for large-scale server deployments. When you source from Omnixon, you benefit from a regional partner that understands the procurement requirements, import regulations, and operational timelines of GCC-based enterprise projects — backed by a commitment to quality and authenticity that protects your infrastructure investment.

Related Products & Ecosystem

To build a complete, optimised server memory configuration, consider complementing this module with related products available from Omnixon's portfolio. For maximum system performance, pair DDR5 RDIMMs with compatible Intel Xeon Scalable or AMD EPYC processors from our CPUs category. Explore our range of enterprise servers from Dell, HPE, Lenovo, and Supermicro that are validated for DDR5 memory. Enhance storage performance alongside your memory upgrade with Enterprise NVMe SSDs from SK hynix, Samsung, and Kioxia available in our Enterprise SSDs category. For complete data centre infrastructure, browse our Server Racks & Enclosures, UPS & Power Protection solutions, and Network Switches to support your server deployment end to end.