SK hynix 32GB DDR5-5600 ECC RDIMM Server Memory HMCG84AGBRA191N

Brand: SK Hynix | Category: Memory (RAM)

SKU: HMCG84AGBRA191N | Part #: HMCG84AGBRA191N

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Product Overview

The SK hynix 32GB DDR5-5600 ECC RDIMM represents a significant leap forward in enterprise server memory technology. Engineered for the demands of modern data centres, high-performance computing clusters, cloud-native deployments, and AI-driven workloads, this module combines the architectural advancements of the DDR5 standard with the reliability safeguards that enterprise IT teams require. Operating at a rated speed of 5600 MT/s, it delivers substantially higher memory bandwidth than its DDR4 predecessors while introducing on-die ECC, improved power efficiency, and a redesigned channel architecture that allows platforms to extract maximum throughput from each DIMM slot.

As a Registered DIMM (RDIMM), this module includes a register component that buffers address and command signals, dramatically improving signal integrity across multi-DIMM configurations. This makes it the preferred choice for server motherboards with dense memory topologies — particularly those based on Intel Xeon Scalable (Sapphire Rapids and beyond) and AMD EPYC (Genoa and later) platforms that are certified to exploit DDR5's full potential. The 32GB capacity strikes the optimal balance between per-slot density and cost efficiency, enabling administrators to build configurations from 128GB to well over 1TB of total system memory on platforms with 16 or more DIMM slots.

SK hynix, one of the world's three largest DRAM manufacturers, produces this module using advanced process nodes that ensure consistent yield, tight timing tolerances, and long-term field reliability. Every unit ships brand new, factory-sealed, and fully tested to JEDEC DDR5 specifications, giving enterprise procurement teams complete confidence in the product's provenance and quality.

Key Features & Benefits

• DDR5-5600 Speed Grade: Operates at 5600 MT/s for superior memory bandwidth compared to DDR4-3200, directly accelerating memory-intensive workloads such as in-memory databases, real-time analytics, and large language model inference.
• 32GB Single-Module Capacity: Offers a practical per-DIMM density that enables scalable memory configurations, allowing server builds ranging from 128GB to multi-terabyte totals when combined across available DIMM slots.
• ECC (Error-Correcting Code) Protection: Detects and corrects single-bit memory errors on the fly, and detects multi-bit errors before they cause data corruption — a non-negotiable requirement for financial systems, healthcare applications, and mission-critical databases.
• Registered (RDIMM) Architecture: The on-module register chip buffers control signals, enabling stable multi-DIMM operation and higher memory densities without compromising electrical integrity or system stability.
• On-Die ECC (ODECC): DDR5 introduces a second layer of error correction at the DRAM die level itself, complementing the traditional DIMM-level ECC and providing enhanced resilience for densely packed, high-frequency operation.
• Improved Power Efficiency: DDR5 operates at a reduced VDD of 1.1V compared to DDR4's 1.2V, translating to measurable reductions in per-module power draw — a critical factor when scaling to hundreds of DIMMs across a large server fleet.
• JEDEC DDR5 Standard Compliance: Full adherence to industry-standard JEDEC specifications ensures interoperability across certified server platforms, simplifying qualification and procurement processes for enterprise IT departments.
• Brand New Condition: Supplied factory-fresh with full manufacturer traceability, eliminating the risks associated with refurbished or grey-market memory modules in production environments.

Technical Architecture

DDR5 represents a fundamental redesign of the DRAM interface rather than an incremental update. At the architectural level, each DDR5 module is divided into two independent 32-bit sub-channels (compared to DDR4's single 64-bit channel), each with its own command and address bus. This design allows the memory controller to address each sub-channel independently, improving bus utilisation efficiency and reducing latency penalties in certain access patterns.

The HMCG84AGBRA191N is built on SK hynix's advanced DRAM fabrication process, using high-density DRAM dies arranged across a standard 288-pin DIMM form factor. The registered buffer (RCD — Registering Clock Driver) on the module intercepts address, command, and control signals from the host memory controller and re-drives them to the DRAM devices with a single cycle of latency. This buffering is essential for multi-rank and high-capacity configurations where direct drive would degrade signal integrity at DDR5 frequencies.

On-Die ECC (ODECC) is implemented within each DRAM die itself, using additional storage cells to detect and correct errors before data leaves the die. This is transparent to the host system and provides an additional layer of data integrity on top of the module-level ECC handled by the memory controller. The combined protection offered by ODECC and host-side ECC makes DDR5 RDIMMs significantly more resilient than previous generations in high-frequency, high-temperature operating environments.

The module's SPD (Serial Presence Detect) EEPROM stores configuration data including timings, voltages, and manufacturer information, enabling the host server's BIOS/UEFI to automatically configure optimal operating parameters during POST. DDR5 also introduces a PMIC (Power Management Integrated Circuit) located directly on the DIMM, shifting voltage regulation responsibilities from the motherboard to the module itself — improving power delivery precision and reducing board-level complexity.

Performance & Capacity

At a rated transfer rate of 5600 MT/s per channel, a single DDR5-5600 RDIMM delivers a peak theoretical bandwidth of approximately 44.8 GB/s. In a dual-channel memory configuration (two DIMMs), aggregate bandwidth approaches 89.6 GB/s — a figure that is particularly impactful for workloads with high memory read bandwidth requirements such as scientific simulations, financial risk modelling, and large-scale vector operations in AI inference pipelines.

The 32GB per-module capacity allows system architects to deploy 256GB of total RAM in an 8-DIMM server with a single CPU, or scale to 512GB and beyond in dual-socket configurations. For platforms supporting 16 DIMM slots per processor, maximum configurations using this density module can reach 1TB or more per server node — sufficient for large in-memory databases such as SAP HANA or Oracle TimesTen running in dedicated server environments.

Typical CAS latency for DDR5-5600 class modules falls in the CL46 to CL48 range, and while absolute latency in nanoseconds is broadly comparable to DDR4, the dramatically higher bandwidth means that memory-bound workloads see real-world throughput improvements that frequently translate directly into reduced job completion times and higher virtual machine density per host.

Compatibility & Integration

The SK hynix HMCG84AGBRA191N is designed for server platforms that support DDR5 ECC RDIMM memory, including:

• Intel Xeon Scalable (4th Gen — Sapphire Rapids): Fully supports DDR5-4800 and DDR5-5600 RDIMMs on platforms such as the Intel Server Board S7200AP and compatible OEM systems from Dell, HPE, Supermicro, Lenovo, and others.
• AMD EPYC (Genoa / Genoa-X / Bergamo): AMD's 9004 series EPYC processors natively support DDR5 with up to 12 DIMM channels per CPU, making this module an ideal match for high-density AMD EPYC platforms.
• JEDEC DDR5 Standard: Full compliance with JESD79-5 ensures interoperability with any DDR5-certified server platform.
• 288-Pin DDR5 DIMM Slot: Physically incompatible with DDR4 slots (keying prevents incorrect insertion), ensuring safe deployment in mixed-generation environments.
• Operating Voltage: 1.1V nominal, compatible with server platforms providing DDR5 VDD power rails.
• ECC Support: Requires a host memory controller with ECC capability enabled in BIOS/UEFI — standard on all enterprise server platforms.

Ideal Use Cases

• AI & Machine Learning Training Infrastructure: Large language model training and inference require enormous memory bandwidth to feed GPU and CPU compute engines. DDR5-5600 RDIMMs provide the sustained bandwidth needed to keep accelerators busy, reducing idle cycles and improving overall training throughput in CPU-GPU hybrid architectures.
• Virtualisation & VDI Platforms: High VM density on VMware vSphere, Microsoft Hyper-V, or KVM hypervisors demands both high memory capacity and low-latency access. The 32GB per-DIMM density enables administrators to pack more VMs per host without sacrificing performance headroom.
• In-Memory Databases & OLAP Analytics: Systems running SAP HANA, Redis, Apache Ignite, or Oracle In-Memory Database benefit directly from increased memory bandwidth, as query performance in these environments is frequently memory-bound rather than storage- or compute-bound.
• High-Performance Computing (HPC) & Scientific Simulation: Computational fluid dynamics, molecular dynamics, finite element analysis, and climate modelling workloads move large data arrays through memory repeatedly. DDR5's bandwidth advantage directly reduces wall-clock time for these memory-intensive simulations.
• Cloud & Hyperscale Data Centres: Cloud service providers building out new server generations can leverage DDR5-5600 RDIMMs to maximise memory bandwidth per rack unit, improving the performance-per-watt ratio across large-scale deployments and enabling denser multi-tenant environments.
• Real-Time Financial & Trading Platforms: Low-latency trading engines, risk calculation systems, and market data processing platforms require both speed and absolute data integrity. ECC protection and high bandwidth make DDR5 RDIMMs the memory of choice for tier-1 financial infrastructure.
• Edge Computing & Telecom Infrastructure: 5G core network functions, vRAN deployments, and edge AI inference nodes increasingly require high-bandwidth, low-power memory in compact 1U or 2U form factors where DDR5's power efficiency and density provide tangible operational advantages.

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 international markets. When you source the SK hynix DDR5-5600 RDIMM through Omnixon, you benefit from local stock availability in the UAE, enabling faster procurement cycles for projects across Saudi Arabia, Qatar, Kuwait, Bahrain, Oman, and the broader Middle East and Africa region. Our enterprise sales team understands the specific compliance, logistics, and technical requirements of GCC-based data centre projects, and we work directly with procurement managers, system integrators, and IT resellers to ensure seamless order fulfilment. All memory modules we supply are brand new, sourced through authorised channels, and come with full traceability documentation — eliminating the supply chain risks associated with grey-market or unverified components. Whether you are refreshing a single server, building out a new hyperscale cluster, or standardising memory across a fleet of enterprise nodes, Omnixon provides the product expertise and regional presence to support your infrastructure goals.

Related Products & Ecosystem

To build a complete, high-performance server infrastructure around this DDR5 memory module, consider pairing it with complementary products available from Omnixon's extensive catalogue. Enterprise server platforms from Dell, HPE, Supermicro, and Lenovo provide the certified DDR5-compatible chassis and motherboards required for deployment. High-performance CPUs from Intel Xeon Scalable and AMD EPYC processor families are the natural compute partners for DDR5 memory configurations. For storage, enterprise NVMe SSDs and enterprise-grade HDDs deliver the persistent storage performance that complements high-bandwidth DDR5 memory in data-intensive workloads. Network adapters, high-speed transceivers, and top-of-rack network switches complete the connectivity layer. UPS and power protection solutions ensure your memory investment is safeguarded against power anomalies, while server rack enclosures and rack PDUs provide the physical infrastructure for organised, efficient deployment.