SK Hynix 256GB DDR5 ECC RDIMM Server Memory Module HMCT14MMERC

Brand: SK Hynix | Category: Memory (RAM)

SKU: HMCT14MMERC | Part #: HMCT14MMERC

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Product Overview

The SK Hynix 256GB DDR5 ECC RDIMM (HMCT14MMERC) represents the pinnacle of server memory engineering, delivering the highest single-module capacity available in the DDR5 generation. Designed for next-generation enterprise servers, high-performance computing (HPC) clusters, and AI/ML infrastructure, this module provides the memory density, bandwidth, and reliability that modern data-intensive workloads demand. As organisations worldwide accelerate digital transformation, the need for greater in-memory compute capacity has never been more critical — and SK Hynix answers that need with this flagship 256GB module.

SK Hynix is one of the world's leading semiconductor manufacturers, trusted by the largest hyperscalers, OEMs, and enterprise IT departments globally. The HMCT14MMERC module is manufactured to the most stringent quality standards, incorporating advanced DDR5 die stacking and packaging technology to achieve 256GB in a single dual inline memory module (DIMM). This makes it an ideal choice for organisations that need to maximise memory per CPU socket without expanding their physical server footprint.

For enterprise IT buyers, system integrators, and data centre architects across the GCC and beyond, this module offers a clear path to maximising the potential of AMD EPYC Genoa/Bergamo and Intel Xeon Sapphire Rapids/Emerald Rapids platforms that support high-capacity DDR5 RDIMMs.

Key Features & Benefits

• 256GB Per Module: Industry-leading single-DIMM capacity allows maximum memory population in servers with limited DIMM slots, reducing the number of modules required for large memory configurations.
• DDR5 Architecture: Delivers significantly higher bandwidth compared to DDR4, with per-channel data rates starting at 4800 MT/s and scalable to higher speeds depending on platform support, benefiting memory-bound applications dramatically.
• ECC (Error Correcting Code): On-die and in-module ECC ensures data integrity at all times, detecting and correcting single-bit errors and detecting multi-bit errors — essential for mission-critical enterprise and financial workloads.
• Registered (Buffered) DIMM Design: The registered command/address bus reduces electrical load on the memory controller, enabling higher DIMM counts per channel and improving system stability at maximum memory configurations.
• On-Die Termination (ODT) & Power Management: DDR5 introduces on-module voltage regulation (PMIC), improving power efficiency and signal integrity compared to DDR4, resulting in lower per-bit energy consumption even at higher frequencies.
• High Reliability & Longevity: SK Hynix's industry-renowned manufacturing process and rigorous binning procedures ensure each module meets enterprise-grade reliability standards, supporting continuous 24/7 operation in demanding data centre environments.
• JEDEC DDR5 Standard Compliance: Fully compliant with JEDEC DDR5 SDRAM standards, ensuring broad compatibility across certified server platforms from major OEMs including Dell, HPE, Lenovo, Supermicro, and others.
• SPD and RCD Integration: Includes Serial Presence Detect (SPD) and Registering Clock Driver (RCD) for automatic platform detection and configuration, simplifying deployment and eliminating manual memory tuning in most server environments.

Technical Architecture

The HMCT14MMERC leverages SK Hynix's advanced 3DS (Three-Dimensional Stacking) TSV (Through-Silicon Via) technology or high-density monolithic die packaging to achieve the 256GB capacity within the standard RDIMM form factor. DDR5 fundamentally reimagines the DIMM architecture compared to its predecessor: each DDR5 module now contains two independent 32-bit sub-channels (effectively two 40-bit channels including ECC), doubling the command/address bandwidth available to the memory controller versus DDR4's single 72-bit channel.

The on-module Power Management Integrated Circuit (PMIC) is one of the most significant architectural innovations in DDR5. In DDR4 designs, voltage regulation was handled by the motherboard's VRM, which introduced noise and efficiency losses over distance. DDR5's on-DIMM PMIC delivers cleaner, more tightly regulated power directly to the DRAM ICs, improving signal integrity and enabling more aggressive frequency and density scaling. This is particularly important for a high-capacity 256GB module where power delivery precision is critical.

The Registering Clock Driver (RCD) on this RDIMM buffers command and address signals from the host memory controller, electrically isolating the DRAM ICs and allowing many more chips to be connected per channel without degrading signal quality. This buffering is what enables ultra-high-capacity configurations — such as fully populating a dual-socket server with terabytes of RAM — while maintaining stable operation at rated frequencies.

Performance & Capacity

With 256GB per module, the HMCT14MMERC enables system configurations that were previously impossible in a standard 2U or 4U rack server footprint. A dual-socket server equipped with 16 DIMM slots (8 per CPU) can achieve up to 4TB of total system memory using 256GB modules — sufficient for the most demanding in-memory databases, large language model (LLM) inference workloads, and real-time analytics engines.

DDR5's architectural improvements deliver substantially higher theoretical peak bandwidth than DDR4. At DDR5-4800 speeds, a dual-channel configuration provides approximately 76.8 GB/s of memory bandwidth per CPU, with actual sustained bandwidth in multi-channel server platforms reaching several hundred GB/s system-wide. For AI inference and HPC workloads that are frequently memory-bandwidth constrained, this represents a transformative performance uplift compared to DDR4-3200 configurations.

Latency characteristics of DDR5, while nominally higher in CAS latency clock cycles compared to DDR4, are broadly comparable in absolute nanoseconds and continue to improve with each JEDEC speed bin revision. For throughput-oriented server workloads — virtualisation, databases, in-memory analytics — the bandwidth gains far outweigh any marginal latency considerations.

Compatibility & Integration

The SK Hynix HMCT14MMERC is designed to operate on server platforms that support high-capacity DDR5 RDIMMs. Compatible platforms typically include:

• Intel Xeon Scalable (4th Gen — Sapphire Rapids) and 5th Gen (Emerald Rapids): Supports DDR5 RDIMMs across LGA4677 platforms with up to 8 channels of DDR5 per socket.
• AMD EPYC (4th Gen — Genoa, Genoa-X, Bergamo, Siena): SP5 socket platforms supporting DDR5 across 12 memory channels per CPU, making them ideal for maximising 256GB RDIMM configurations.
• OEM Server Systems: Dell PowerEdge (R760, R860, R960), HPE ProLiant (DL380 Gen11, DL560 Gen11), Lenovo ThinkSystem (SR650 V3, SR850 V3), Supermicro X13 series, and other DDR5 RDIMM-certified systems.
• JEDEC DDR5 Standard: Full compliance with JEDEC JESD79-5 ensures interoperability across all compliant platforms.
• Operating System Compatibility: Compatible with all major enterprise operating systems including Red Hat Enterprise Linux (RHEL), SUSE Linux Enterprise Server (SLES), VMware ESXi, Windows Server 2022, and Ubuntu Server LTS.
• Certifications: Manufactured and tested to RoHS compliance standards. Enterprise-grade binning and validation processes applied at the factory level.

Ideal Use Cases

• Artificial Intelligence & Machine Learning Training: Large language model pre-training and fine-tuning operations require massive in-memory data staging. 256GB RDIMMs allow GPU-accelerated AI servers to maintain larger active datasets in system memory, reducing PCIe bandwidth bottlenecks between storage and GPU VRAM.
• In-Memory Databases (SAP HANA, Redis, VoltDB): Platforms like SAP HANA are architected to hold entire databases in DRAM for real-time analytics. High-capacity DDR5 RDIMMs dramatically expand the database size that can be served from a single server node, reducing infrastructure sprawl.
• Large-Scale Server Virtualisation: VMware vSphere, Microsoft Hyper-V, and KVM hypervisors benefit enormously from maximum DRAM density. More RAM per host means more VMs, larger VM memory allocations, and fewer physical servers needed to support the same virtual estate — reducing licensing, power, and space costs.
• High-Performance Computing (HPC) & Scientific Simulation: Computational fluid dynamics, genomics processing, climate modelling, and finite element analysis workloads are routinely memory-capacity and bandwidth constrained. 256GB DDR5 RDIMMs enable researchers to tackle larger problem sets within a single server node.
• OLAP & Real-Time Business Intelligence: Columnar analytics databases such as ClickHouse, Apache Druid, and Snowflake on-premises deployments benefit from maximum DRAM to cache hot data and accelerate aggregation queries across billions of rows.
• Cloud & Hyperscale Infrastructure: Cloud service providers building high-density compute nodes for memory-optimised VM instance families (analogous to AWS r-series or Azure Eav5 instances) can maximise per-node revenue by populating servers with the fewest, highest-capacity DIMMs.
• Financial Services & Risk Analytics: Monte Carlo simulations, derivatives pricing engines, and real-time risk aggregation platforms require both large memory capacity and ECC protection to ensure computational accuracy — exactly what this module delivers.

Why Buy from Omnixon

Omnixon Global is a trusted B2B IT hardware distributor headquartered in Dubai, UAE, strategically positioned to serve enterprise clients across the GCC, Middle East, Africa, and international markets. Our inventory of SK Hynix server memory — including high-capacity DDR5 RDIMMs — is sourced directly from authorised channels, ensuring authenticity, full traceability, and consistent product quality. With local stock availability in Dubai and established logistics partnerships across the region, Omnixon is able to fulfil enterprise memory requirements for data centre build-outs, server refresh programmes, and urgent capacity expansions. Our technical sales team understands the complexities of enterprise memory procurement — from platform compatibility verification to multi-socket configuration planning — and is available to support your project from initial specification through to post-deployment. Whether you are an enterprise IT department, a system integrator, a cloud provider, or a managed service operator, Omnixon offers the product expertise, supply chain reliability, and regional presence to be your preferred hardware partner in the GCC and beyond.

Related Products & Ecosystem

The SK Hynix 256GB DDR5 RDIMM is most effective when deployed as part of a well-architected server platform. Omnixon supplies the full ecosystem of components that complement high-density memory configurations:

• Enterprise Servers: Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem, and Supermicro platforms optimised for DDR5 RDIMM deployment.
• CPUs: Intel Xeon Scalable 4th/5th Gen and AMD EPYC 4th Gen processors that unlock the full bandwidth potential of DDR5 memory.
• Enterprise NVMe SSDs: High-capacity NVMe storage to complement large in-memory workloads where datasets exceed available DRAM.
• GPUs & AI Accelerators: NVIDIA H100, A100, and L40S accelerators for AI/ML servers where system memory works in concert with GPU VRAM.
• Network Adapters & High-Speed Interconnects: 100GbE and 400GbE NICs and InfiniBand HCAs for HPC and AI cluster networking.
• Additional Memory Modules: Complementary DDR5 RDIMM capacities (32GB, 64GB, 128GB) for mixed-density or tiered memory configurations.