SK Hynix 32GB DDR5 6400MHz RDIMM ECC Registered Server Memory HMCG84CHBRA

Brand: SK Hynix | Category: Memory (RAM)

SKU: HMCG84CHBRA | Part #: HMCG84CHBRA | MPN: HMCG84CHBRA

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Product Overview

The SK Hynix 32GB DDR5-6400 RDIMM (Registered Dual Inline Memory Module) represents the cutting edge of enterprise server memory technology. Operating at a blazing 6400 MT/s data transfer rate, this module is engineered for mission-critical server platforms that demand exceptional memory bandwidth, superior reliability, and the highest levels of data integrity. Built on SK Hynix's advanced DDR5 fabrication process, this 32GB module is purpose-built for modern hyperscale data centres, cloud service providers, enterprise IT infrastructures, and AI/ML compute clusters where memory performance is a primary bottleneck.

DDR5 represents a fundamental generational leap over DDR4, delivering roughly double the bandwidth and significantly improved power efficiency. The RDIMM form factor incorporates an on-module register chip that buffers command and address signals, dramatically reducing electrical load on the memory controller and enabling larger memory configurations per server node. This makes the SK Hynix 32GB DDR5-6400 RDIMM an ideal foundation for memory-intensive enterprise workloads including in-memory databases, real-time analytics, virtual machine consolidation, and high-performance computing.

As a brand-new, factory-sealed module sourced through authorised channels, this SK Hynix component delivers the reliability and consistency that enterprise procurement teams expect. Omnixon Global stocks this module in Dubai for rapid fulfilment across the GCC region and international enterprise accounts.

Key Features & Benefits

• Ultra-High Speed at 6400 MT/s: DDR5-6400 delivers up to 51,200 MB/s of theoretical peak bandwidth per module, making it one of the fastest commercially available RDIMM solutions for enterprise servers, significantly accelerating data-intensive workloads.
• 32GB Density per Module: A balanced capacity-per-slot ratio that enables large aggregate memory configurations — populate a dual-socket server with 16 DIMM slots to achieve up to 512GB of total system memory, sufficient for demanding virtualisation, OLAP, and AI inference workloads.
• ECC (Error-Correcting Code) Support: On-die ECC combined with system-level ECC continuously detects and corrects single-bit memory errors and flags multi-bit errors, safeguarding data integrity across prolonged operational periods in always-on enterprise environments.
• Registered (Buffered) Architecture: The RDIMM register chip offloads signal buffering from the CPU memory controller, enabling higher DIMM counts per channel without signal integrity degradation — critical for maximising memory capacity in enterprise server deployments.
• DDR5 On-Die ECC: SK Hynix integrates on-die ECC directly within the DRAM die itself, providing an additional layer of error correction before data even reaches the system memory controller, improving overall system stability and data reliability.
• Reduced Power Consumption: DDR5 operates at 1.1V compared to DDR4's 1.2V, translating into measurable power savings at scale — particularly significant in dense server deployments where memory power draw constitutes a meaningful percentage of total rack power consumption.
• Improved Channel Architecture: DDR5 introduces two independent 32-bit sub-channels per module (compared to DDR4's single 64-bit channel), improving memory access granularity, reducing latency for small data transfers, and increasing effective memory bus utilisation.
• Enterprise-Grade Reliability: Manufactured by SK Hynix — one of the world's three largest DRAM producers — with rigorous quality control, burn-in testing, and compliance with JEDEC DDR5 standards, ensuring long-term operational stability in 24/7 server environments.

Technical Architecture

The HMCG84CHBRA is built on SK Hynix's advanced 1a-nm (1st generation 10nm-class) DRAM process node, which delivers improved cell density, reduced leakage current, and enhanced performance characteristics compared to previous process generations. The module utilises a standard 288-pin DDR5 RDIMM PCB layout, compatible with DDR5-capable server platforms from major OEMs including Intel Xeon Scalable (Sapphire Rapids and later) and AMD EPYC (Genoa and later) processor families.

Internally, the module features a registered clock driver (RCD) compliant with the JEDEC DDR5 RCD specification, which buffers command, address, and clock signals to the DRAM components. This buffering is fundamental to the RDIMM's ability to support higher slot counts per memory channel than unbuffered (UDIMM) alternatives. The 32GB capacity is achieved through a configuration of 16 DRAM die packages arranged across the PCB in a dual-rank topology, balancing capacity with access latency characteristics suitable for enterprise workloads.

The SPD (Serial Presence Detect) EEPROM stores module configuration parameters — including speed bins, timing parameters, voltage requirements, and thermal thresholds — enabling the host system's BIOS/UEFI to automatically configure optimal operating parameters during POST. The module also supports JEDEC-defined XMP/EXPO-equivalent DDR5 performance profiles on compatible platforms.

Performance & Capacity

At DDR5-6400 speed grade, each module delivers a theoretical peak bandwidth of approximately 51,200 MB/s (51.2 GB/s) per module. In a dual-channel configuration with two modules, aggregate bandwidth reaches approximately 102.4 GB/s per CPU socket — a substantial increase over DDR4-3200 dual-channel configurations that top out around 51.2 GB/s total. This bandwidth advantage directly translates into measurable performance gains for bandwidth-bound workloads including:

• Large language model (LLM) inference and AI/ML training jobs that require high memory throughput for weight loading
• In-memory database platforms such as SAP HANA, Redis, and VoltDB where dataset size and access speed determine query latency
• High-frequency financial trading platforms requiring deterministic low-latency memory access
• Video transcoding and media processing pipelines handling 4K/8K uncompressed streams
• Scientific computing and simulation workloads with large working sets

Operating latency at DDR5-6400 with standard JEDEC timings delivers a CAS latency (CL) typically in the CL46-CL52 range, with absolute latency in nanoseconds remaining competitive with DDR4 despite the higher frequency, owing to DDR5's architectural improvements. The 32GB per-module capacity ensures adequate headroom for virtual machine memory allocation without excessive NUMA node fragmentation in multi-socket server deployments.

Compatibility & Integration

The SK Hynix 32GB DDR5-6400 RDIMM is designed for compatibility with enterprise server platforms that support DDR5 RDIMM technology. Key compatibility considerations include:

• Intel Xeon Scalable: Compatible with 4th Gen Intel Xeon Scalable (Sapphire Rapids) and 5th Gen (Emerald Rapids) platforms supporting DDR5-4800 to DDR5-6400 speed grades, including platforms from Dell EMC, HPE, Lenovo, Supermicro, and Inspur
• AMD EPYC: Compatible with AMD EPYC 9004 series (Genoa) and EPYC 9005 series (Turin) platforms that support DDR5 RDIMM memory across their 12-channel memory subsystems
• JEDEC Compliance: Fully compliant with JEDEC DDR5 SDRAM Standard (JESD79-5) and DDR5 RDIMM specification, ensuring broad interoperability across compliant server platforms
• Operating Systems: Compatible with all major enterprise OS platforms including Red Hat Enterprise Linux, SUSE Linux Enterprise Server, Ubuntu Server LTS, VMware ESXi, Microsoft Windows Server, and major hypervisor and container orchestration stacks
• Memory Subsystem Standards: Supports DDR5 on-die ECC, system ECC, and optional Advanced ECC (AECC) modes where supported by the host platform memory controller

Ideal Use Cases

The SK Hynix 32GB DDR5-6400 RDIMM is a versatile enterprise memory solution suited to a wide range of demanding deployment scenarios:

• AI & Machine Learning Infrastructure: GPU-accelerated AI servers require fast CPU-side memory to feed training data pipelines and host model parameters during inference. DDR5-6400 bandwidth reduces CPU memory bottlenecks in AI compute nodes paired with NVIDIA H100, A100, or AMD Instinct accelerators.
• High-Density Virtualisation: Enterprise VMware ESXi, Microsoft Hyper-V, and Red Hat KVM hypervisor hosts benefit from large, fast memory pools. Higher per-module density reduces the number of DIMMs required while maximising VM density per host node.
• In-Memory Database Platforms: Platforms such as SAP HANA, Oracle TimesTen, and Redis Enterprise require terabytes of fast, reliable memory. DDR5-6400 RDIMMs provide the bandwidth and capacity needed for large in-memory dataset hosting.
• HPC and Scientific Computing: Weather modelling, genomics, computational fluid dynamics, and finite element analysis workloads are highly memory-bandwidth sensitive. DDR5-6400 accelerates these simulations by reducing data starvation at the CPU level.
• Cloud and Colocation Infrastructure: Cloud service providers and colocation operators building multi-tenant server fleets require memory modules that combine high performance, reliability, and ECC protection to meet SLA commitments across diverse tenant workloads.
• Real-Time Analytics and OLAP: Business intelligence platforms running columnar databases such as ClickHouse, Apache Druid, or Teradata benefit from high memory bandwidth when scanning large datasets for real-time reporting and analytics queries.
• VDI (Virtual Desktop Infrastructure): Citrix Virtual Apps and Desktops, VMware Horizon, and Microsoft AVD deployments on-premises require substantial DRAM capacity per host server. DDR5-6400 RDIMMs maximise the number of concurrent virtual desktops per node.

Why Buy from Omnixon Global

Omnixon Global is a trusted B2B IT hardware distributor headquartered in Dubai, UAE, serving enterprise clients across the GCC, Middle East, Africa, and international markets. We maintain physical stock of high-demand server memory components including SK Hynix DDR5 RDIMMs in our Dubai warehouse, enabling rapid order processing and fulfilment for customers across Saudi Arabia, the UAE, Qatar, Kuwait, Bahrain, Oman, and beyond. Our enterprise procurement team has deep expertise in server memory compatibility, configuration guidance, and bulk order management — ensuring that your infrastructure project receives the right components, correctly specified, without unnecessary delays. All products supplied by Omnixon are brand new, sourced through reputable supply channels, and subject to our quality verification process. Whether you are a systems integrator, cloud provider, government IT department, or enterprise IT manager, Omnixon Global provides the reliability, regional presence, and technical knowledge your procurement process demands.

Related Products & Ecosystem

To build a complete, high-performance server memory infrastructure, consider complementing the SK Hynix DDR5-6400 RDIMM with the following product categories available from Omnixon Global:

• Enterprise Servers: DDR5-compatible server platforms from Dell EMC, HPE, Lenovo, Supermicro, and Inspur that are validated for DDR5-6400 RDIMM operation
• CPUs: 4th/5th Gen Intel Xeon Scalable and AMD EPYC 9004/9005 series processors that unlock DDR5-6400 memory channel bandwidth
• Enterprise SSDs: NVMe Gen4/Gen5 SSDs and U.2/U.3 enterprise SSDs to complement high-speed memory in storage-intensive server configurations
• GPUs: NVIDIA and AMD GPU accelerators for AI/ML server builds where CPU-side DDR5 memory feeds data pipelines
• Network Adapters & NICs: High-speed 25GbE, 100GbE, and 400GbE NICs to match the network throughput demands of high-memory-bandwidth server workloads
• Server Racks & Enclosures: Enterprise rack enclosures and accessories for complete data centre infrastructure deployments