SK hynix 256GB DDR5 ECC RDIMM Server Memory Module HMCT14MKERC

Brand: SK Hynix | Category: Memory (RAM)

SKU: HMCT14MKERC | Part #: HMCT14MKERC

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Product Overview

The SK hynix 256GB DDR5 ECC RDIMM (Registered Dual Inline Memory Module) represents the pinnacle of enterprise server memory engineering, purpose-built for the most demanding compute environments on the planet. As one of the world's leading DRAM manufacturers, SK hynix has engineered this module to meet the rigorous requirements of modern hyperscale data centres, AI/ML training clusters, enterprise virtualisation hosts, and in-memory database platforms. With an extraordinary 256GB per DIMM capacity, this module allows system architects to maximise memory density per CPU socket, dramatically reducing the number of modules required to populate a server while simultaneously boosting aggregate bandwidth and reducing inter-node latency.

DDR5 technology marks a fundamental generational leap over DDR4, doubling the burst length and introducing on-die ECC, independent sub-channels, and higher native frequencies. The RDIMM (Registered) form factor adds a register buffer between the memory controller and the DRAM ICs, enabling higher module counts per channel and greater signal integrity at scale — making it the standard choice for enterprise and HPC deployments. Whether you are building an AI inference cluster, deploying SAP HANA, running large-scale Kubernetes workloads, or consolidating virtualised infrastructure, the SK hynix 256GB DDR5 ECC RDIMM provides the memory backbone your platform demands.

Key Features & Benefits

• Exceptional 256GB Capacity per DIMM: Industry-leading single-module density allows maximum RAM population within a constrained DIMM slot count, ideal for servers with limited slots that still require terabyte-scale memory.
• DDR5 Generation Performance: DDR5 architecture delivers significantly higher bandwidth compared to DDR4 through doubled burst length, dual 32-bit sub-channels per module, and higher native clock speeds, enabling faster data movement across the memory bus.
• ECC (Error-Correcting Code) Protection: Hardware-level single-bit error correction and multi-bit error detection ensure uninterrupted operation across 24/7 mission-critical workloads, protecting data integrity at every clock cycle.
• Registered (RDIMM) Signal Integrity: The on-module register buffer re-drives command and address signals, improving signal integrity and enabling higher DIMM populations per memory channel without compromising stability or performance.
• On-Die ECC (ODECC): DDR5 introduces on-die ECC within the DRAM ICs themselves, providing an additional layer of error correction before data even reaches the memory controller — enhancing reliability at unprecedented density levels.
• Reduced Power Consumption: DDR5 operates at 1.1V compared to DDR4's 1.2V, delivering improved energy efficiency per bit transferred — a critical consideration for large-scale deployments where power and cooling costs are significant operational expenses.
• Standards-Compliant Design: Engineered to meet JEDEC DDR5 RDIMM specifications, ensuring broad compatibility across certified server platforms from leading OEMs including Intel and AMD-based systems.
• Thermal Reliability: SK hynix employs advanced packaging and binning processes to ensure consistent thermal performance across the operating temperature range required for enterprise rack environments.

Technical Architecture

The HMCT14MKERC module is built on SK hynix's advanced DRAM fabrication process, leveraging high-density stacking and precision packaging to achieve 256GB within a standard DIMM form factor. DDR5 RDIMM architecture introduces several structural innovations over previous generations. Each module features two independent 32-bit sub-channels (plus ECC bits), effectively enabling the memory controller to treat a single physical DIMM as two independent logical channels — dramatically improving bandwidth utilisation in multi-threaded workloads.

The registered buffer (RCD — Registering Clock Driver) is a critical component of the RDIMM design. It captures command, address, and clock signals from the host memory controller and re-drives them to the DRAM ICs with precise timing, reducing electrical loading on the memory bus. This allows server platforms to support higher DIMM populations per channel while maintaining signal fidelity at elevated frequencies. For 256GB ultra-high-density modules, this buffering is not optional — it is essential to physical signal integrity at this capacity point.

DDR5 also introduces a PMIC (Power Management IC) directly on the DIMM itself, shifting voltage regulation from the motherboard to the module. This provides more precise, localised power delivery to the DRAM ICs, improving voltage stability and enabling finer power management granularity. The result is a more stable operating environment under dynamic load conditions — exactly the scenario encountered in AI training and transactional database workloads.

Performance & Capacity

The 256GB capacity per module enables system builders to achieve multi-terabyte memory configurations in dual-socket servers without exhausting DIMM slots. A dual-socket server with 16 DIMM slots can reach 4TB of total RAM using 256GB RDIMMs — a configuration that would have required significantly more complex infrastructure with previous-generation modules.

DDR5's architectural improvements translate directly to measurable performance gains in bandwidth-intensive applications. The dual sub-channel design and higher native frequencies enable peak memory bandwidth figures that far exceed DDR4 RDIMM equivalents. For AI and HPC workloads where the memory subsystem is frequently the performance bottleneck, this bandwidth uplift directly accelerates training throughput, inference latency, and data processing pipelines. In-memory database platforms such as SAP HANA benefit from both the raw capacity and the reduced latency profile of DDR5 at supported speeds.

Compatibility & Integration

The SK hynix 256GB DDR5 ECC RDIMM is designed for compatibility with server platforms based on Intel Xeon Scalable (Sapphire Rapids and successors) and AMD EPYC (Genoa and successors) processors, both of which introduce native DDR5 memory controller support. The module adheres to JEDEC DDR5 RDIMM standards (JESD79-5), ensuring interoperability with certified motherboards and server chassis from major OEMs and ODMs.

Before deployment, administrators should verify the specific server platform's Qualified Vendor List (QVL) or memory support matrix for 256GB RDIMM entries, as ultra-high-density DIMMs may require specific BIOS versions or platform configurations. The module is compatible with standard DDR5 RDIMM slots (288-pin) and integrates seamlessly with enterprise server management tools via SPD (Serial Presence Detect) and TS (Temperature Sensor) interfaces, enabling IPMI and BMC monitoring of module health and thermal status.

• JEDEC DDR5 RDIMM (JESD79-5) compliant
• Compatible with Intel Xeon Scalable (4th Gen+) platforms
• Compatible with AMD EPYC (Genoa/Bergamo/Turin) platforms
• 288-pin DDR5 RDIMM slot interface
• SPD and thermal sensor support for IPMI/BMC integration
• RoHS compliant manufacturing

Ideal Use Cases

• AI & Machine Learning Training: Large language models, deep neural network training, and computer vision workloads require massive in-memory datasets. 256GB RDIMMs enable multi-terabyte memory pools within a single server node, reducing dataset spilling to NVMe and dramatically improving training iteration times.
• High-Density Server Virtualisation: VMware vSphere, Microsoft Hyper-V, and Red Hat OpenShift environments benefit from maximum per-host memory to increase VM density, reduce cluster node count, and improve VM-to-host consolidation ratios.
• In-Memory Databases (SAP HANA, Redis, VoltDB): Platforms that cache entire databases in RAM achieve transformative performance improvements. 256GB per DIMM allows large HANA instances to reside fully in-memory on fewer physical servers.
• HPC & Scientific Computing: Genomics, computational fluid dynamics, financial risk modelling, and climate simulation workloads with large working sets benefit directly from high-bandwidth, high-capacity DDR5 memory substrates.
• Cloud Service Provider Infrastructure: CSPs deploying hyperscale compute nodes require memory configurations that maximise vCPU-to-RAM ratios to meet diverse tenant workload profiles — 256GB RDIMMs are a natural fit for next-generation cloud rack designs.
• Real-Time Analytics & OLAP: Business intelligence platforms performing real-time OLAP queries across large datasets achieve lower query latency and higher concurrency when the analytical working set fits entirely within system RAM.
• Edge AI Inference Servers: High-density edge compute nodes performing local AI inference on large model weights benefit from maximum single-node memory to avoid model sharding across hosts.

Why Buy from Omnixon

Omnixon Global is a trusted B2B IT hardware distributor headquartered in Dubai, UAE, with deep expertise serving enterprise clients across the GCC region and internationally. When you source the SK hynix 256GB DDR5 ECC RDIMM through Omnixon, you benefit from local inventory availability in the UAE, enabling rapid fulfilment for enterprise projects across Saudi Arabia, Qatar, Kuwait, Bahrain, Oman, and beyond. Our procurement team specialises in high-density memory modules and understands the platform-specific qualification requirements that enterprise buyers face. Omnixon maintains rigorous product authenticity standards — every SK hynix module we supply is sourced through authorised channels, ensuring genuine product with full manufacturer provenance. Our enterprise sales team can assist with compatibility verification, bulk procurement planning, and integration into your existing server refresh or greenfield build programme. For data centre operators, cloud builders, and enterprise IT teams across the Middle East and globally, Omnixon provides the regional expertise, product depth, and responsive account management that complex memory procurement demands.

Related Products & Ecosystem

To build a complete, optimised server memory infrastructure, consider pairing this module with complementary products available through Omnixon. High-performance servers from Dell, HPE, Lenovo, and Supermicro are validated platforms for DDR5 RDIMM deployment. Enterprise NVMe SSDs and high-capacity SAS/SATA HDDs complement your memory strategy for tiered storage architectures. For AI and HPC clusters, NVIDIA GPU accelerators and high-bandwidth network adapters (25GbE/100GbE NICs) from Mellanox/NVIDIA and Broadcom are natural ecosystem additions. Network switches from Cisco, Arista, and Juniper provide the fabric connectivity required to link memory-dense compute nodes at scale. Explore Omnixon's full range of enterprise memory, servers, storage, and networking to complete your infrastructure build.