SK Hynix HMCG84BHB 32GB DDR5-6400 RDIMM ECC Registered Server Memory Module

Brand: SK Hynix | Category: Memory (RAM)

SKU: HMCG84BHB | Part #: HMCG84BHB | MPN: HMCG84BHB

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Product Overview

The SK Hynix HMCG84BHB is a 32GB DDR5-6400 Registered DIMM (RDIMM) engineered for the most demanding enterprise server environments. As organisations accelerate their adoption of AI, machine learning, high-performance computing, and virtualised infrastructure, memory bandwidth and capacity have become critical bottlenecks. This module addresses those challenges head-on by delivering DDR5 technology at 6400 MT/s — one of the highest frequencies available in the enterprise RDIMM segment — combined with ECC (Error-Correcting Code) protection to ensure data integrity under sustained, mission-critical workloads.

Built on SK Hynix's advanced semiconductor fabrication process, the HMCG84BHB represents the cutting edge of DRAM engineering. It is designed to pair seamlessly with the latest generation of Intel Xeon Scalable (Sapphire Rapids and Emerald Rapids) and AMD EPYC (Genoa and Bergamo) server platforms, providing OEMs, system integrators, and enterprise IT teams with a reliable, performance-validated memory solution that scales from single-socket edge servers to multi-socket hyperscale deployments.

For enterprises in the GCC and wider Middle East region investing in AI infrastructure, cloud-native platforms, or large-scale database consolidation, the SK Hynix HMCG84BHB offers an optimal balance of speed, capacity, power efficiency, and long-term operational stability. Omnixon Global stocks this module in Dubai and can supply it to enterprise clients across the UAE, Saudi Arabia, Qatar, Kuwait, Bahrain, Oman, and international markets with full procurement support.

Key Features & Benefits

• DDR5-6400 Speed: Operating at 6400 MT/s, this RDIMM delivers approximately 51.2 GB/s of peak memory bandwidth per channel — a dramatic improvement over DDR4 platforms — enabling faster data movement between processors and memory for compute-intensive workloads.
• 32GB High-Capacity Density: A 32GB per-module capacity allows system architects to populate servers with large memory footprints without exhausting DIMM slots, maximising total addressable memory in servers with 8, 12, or 16 DIMM slots per CPU socket.
• ECC Error Correction: On-die and module-level ECC functionality continuously monitors and corrects single-bit memory errors in real time, protecting data integrity and preventing unplanned downtime in production environments where memory errors are unacceptable.
• Registered (Buffered) Architecture: The RDIMM register chip isolates the memory bus from the host controller, enabling higher DIMM counts per channel and greater overall system memory capacity without compromising signal integrity or stability.
• On-Die ECC (ODECC): DDR5 introduces native on-die ECC within the DRAM die itself, providing an additional layer of error correction before data even reaches the memory controller — a critical enhancement for high-density deployments where cell-level bit errors are more prevalent.
• Improved Power Efficiency: DDR5 operates at a 1.1V nominal supply voltage compared to DDR4's 1.2V, reducing per-module power consumption and total thermal load in high-density memory configurations — directly reducing cooling costs in large data centre deployments.
• Dual Sub-Channel Architecture: DDR5 introduces two independent 32-bit sub-channels per DIMM, improving parallelism and reducing memory access latency for workloads with irregular or mixed access patterns such as in-memory analytics and real-time inference.
• SK Hynix Manufacturing Quality: Produced by one of the world's top three DRAM manufacturers, the HMCG84BHB is subject to rigorous qualification testing, ensuring consistent yield, reliability, and compatibility across major server OEM platforms.

Technical Architecture

The HMCG84BHB is built on SK Hynix's advanced 1anm (1α) DRAM process node, which delivers improved cell density and reduced power consumption compared to prior-generation nodes. The module uses a 288-pin DDR5 UDIMM-compatible pinout in RDIMM form factor — 1.1V operational voltage — and is designed to meet JEDEC DDR5 RDIMM specifications at SPD-programmed speeds up to 6400 MT/s.

The registered buffer (RCD) on the module acts as a command/address repeater between the memory controller and the DRAM devices, effectively reducing electrical loading on the host memory bus. This allows motherboards with multiple DIMMs per channel to maintain signal integrity at high frequencies, a critical design requirement for enterprise platforms with large memory configurations.

The module's DDR5 dual sub-channel design splits each 64-bit data interface into two independent 32-bit channels, each with its own command/address bus and ECC logic. This architectural change allows memory controllers to service two independent requests simultaneously per DIMM, improving effective bandwidth utilisation under real-world mixed-workload conditions. The combination of ODECC within the DRAM die and system-level ECC through the memory controller provides a dual-layer fault protection scheme that significantly enhances RAS (Reliability, Availability, Serviceability) characteristics.

Performance & Capacity

At DDR5-6400 operating frequency, each HMCG84BHB module delivers a theoretical peak bandwidth of approximately 51.2 GB/s per memory channel. In a dual-channel configuration (as found in most two-socket server platforms), aggregate bandwidth per CPU socket can reach 102.4 GB/s, enabling processor-to-memory data transfer rates that are essential for modern AI inference, large language model (LLM) training, and in-memory database workloads.

With a 32GB module capacity, a server equipped with 16 DIMM slots can achieve a total system memory of 512GB per CPU socket when fully populated — providing the large working memory footprints demanded by SAP HANA, Oracle In-Memory Database, Redis, and similar in-memory data platforms. Memory latency at DDR5-6400 frequencies, while slightly higher in absolute CAS latency cycles compared to DDR4, translates to competitive real-world nanosecond latency due to the higher clock frequency and improved architecture of the DDR5 memory controller interface.

Compatibility & Integration

The SK Hynix HMCG84BHB is designed for compatibility with server platforms and motherboards supporting DDR5 RDIMM memory. It is validated and qualified for use with:

• Intel Xeon Scalable 4th Generation (Sapphire Rapids) and 5th Generation (Emerald Rapids) platforms on Intel's Eagle Stream server architecture
• AMD EPYC 9004 Series (Genoa, Genoa-X) and 9754/9654 (Bergamo) platforms using the SP5 socket
• Major server OEM platforms from HPE (ProLiant Gen11), Dell PowerEdge (16th Generation), Lenovo ThinkSystem (V3), Supermicro, and Inspur, subject to OEM qualification matrices
• JEDEC DDR5 RDIMM standard compliance — ensuring broad interoperability across compliant motherboards and memory controllers
• Linux kernel versions 5.15+ and Windows Server 2022/2025 with full DDR5 memory controller driver support
• VMware vSphere 8.0 and later, Red Hat Enterprise Linux 9.x, SUSE Linux Enterprise Server 15 SP4+

Ideal Use Cases

• AI & Machine Learning Training: Large language model training and inference workloads require massive memory bandwidth and capacity to feed GPU and CPU compute engines. Populating AI training servers with multiple HMCG84BHB modules eliminates memory bottlenecks that would otherwise throttle GPU utilisation.
• High-Density Server Virtualisation: VMware, KVM, and Hyper-V environments running hundreds of VMs per host demand large memory pools. The 32GB density of each module allows virtualisation hosts to achieve 512GB+ total memory configurations without exhausting available DIMM slots.
• In-Memory Databases & OLAP Analytics: SAP HANA, Oracle TimesTen, MemSQL, and similar in-memory platforms stage entire production datasets in DRAM. The bandwidth and capacity provided by DDR5-6400 RDIMMs dramatically accelerates query processing and real-time analytics pipelines.
• High-Performance Computing (HPC) & Scientific Simulation: Computational fluid dynamics, finite element analysis, genomics, and climate modelling workloads are memory-bandwidth bound. The DDR5-6400 interface provides the throughput these simulations require to maintain high CPU utilisation across multi-socket server nodes.
• Cloud & Hyperscale Infrastructure: Cloud service providers building shared compute infrastructure benefit from the high memory density and per-module efficiency of DDR5 RDIMMs, enabling more tenant workloads per physical server node and reducing total cost of ownership.
• Real-Time Streaming & Event Processing: Apache Kafka, Flink, and Spark Streaming platforms process high-velocity data streams in memory. DDR5-6400's improved bandwidth and sub-channel parallelism helps sustain throughput targets in latency-sensitive financial, telemetry, and IoT data pipelines.
• Enterprise ERP & CRM Consolidation: Large-scale SAP S/4HANA and Oracle EBS deployments running on modern two-socket servers benefit from the capacity and bandwidth headroom of DDR5 RDIMMs, enabling database and application layers to share physical infrastructure without performance degradation.

Why Buy from Omnixon Global

Omnixon Global is a trusted B2B IT hardware distributor headquartered in Dubai, UAE, with an established track record of supplying enterprise-grade memory, servers, storage, and networking components to organisations across the GCC, Middle East, Africa, and global markets. Our Dubai-based inventory means that enterprise and government clients in the UAE, Saudi Arabia, Qatar, Kuwait, Bahrain, and Oman can source critical components like the SK Hynix HMCG84BHB with confidence, backed by local procurement expertise and regional logistics capability. Our team includes experienced hardware specialists who can assist with memory compatibility verification, system configuration advice, and multi-unit procurement planning for data centre build-outs and server refresh programmes. We serve hyperscalers, co-location providers, government agencies, financial institutions, healthcare networks, and system integrators who require reliable supply, verified authenticity, and professional account management — not just a transactional purchase experience.

Related Products & Ecosystem

The SK Hynix HMCG84BHB RDIMM is one component in a broader server memory and infrastructure ecosystem. Omnixon Global also supplies complementary products that pair naturally with DDR5 memory upgrades, including enterprise-grade CPUs (Intel Xeon and AMD EPYC), rack servers from Dell, HPE, Lenovo, and Supermicro, enterprise NVMe SSDs and SAS/SATA storage for tiered data architectures, high-speed network adapters and transceivers for low-latency server interconnects, server rack enclosures and rack PDUs for organised data centre deployments, and UPS and power protection systems to safeguard memory-intensive workloads against power events. Whether you are building a new AI infrastructure cluster, expanding a virtualisation farm, or refreshing an existing data centre with next-generation DDR5 platforms, Omnixon can source and supply the full stack of components required to complete your project.