SK Hynix 128GB DDR5 7200MHz RDIMM ECC Server Memory HMCT04MKBRC

Brand: SK Hynix | Category: Memory (RAM)

SKU: HMCT04MKBRC | Part #: HMCT04MKBRC | MPN: HMCT04MKBRC

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Product Overview

The SK Hynix 128GB DDR5-7200 RDIMM (Registered Dual In-Line Memory Module) represents the cutting edge of enterprise server memory technology. Operating at a blazing 7200 MT/s data rate with DDR5 architecture, this high-capacity module is purpose-built for the most demanding server and workstation platforms deployed in modern data centres, AI/ML inference and training clusters, high-performance computing (HPC) facilities, and large-scale cloud environments. SK Hynix, one of the world's leading semiconductor manufacturers, engineered this module to deliver exceptional bandwidth, improved power efficiency, and rock-solid reliability through on-die ECC (Error Correction Code) and traditional RDIMM registered buffering.

At 128GB per DIMM, this module enables system architects to achieve extraordinary memory density within a single server node. Platforms supporting 12, 16, or 24 DIMM slots can now be configured with multiple terabytes of RAM — unlocking capabilities previously reserved for specialised, purpose-built appliances. Whether you are running in-memory databases, large language model (LLM) inference, real-time analytics, or containerised microservices at scale, the SK Hynix 128GB DDR5-7200 RDIMM is a foundational component that removes memory as a bottleneck in your infrastructure.

As enterprise IT teams face mounting pressure to consolidate workloads, reduce physical server footprints, and maintain performance SLAs, high-density DDR5 RDIMMs like this module deliver a compelling path forward. Upgrading to 128GB modules allows organisations to double or quadruple their per-server memory capacity without adding rack units, power draw, or cooling complexity — a significant advantage in any colocation or on-premises data centre environment.

Key Features & Benefits

• 128GB High Density: Maximise per-socket memory capacity to support memory-intensive applications, large VM counts, and in-memory database workloads without expanding your physical server footprint.
• DDR5-7200 Speed: Operates at 7200 MT/s, delivering substantially higher bandwidth compared to DDR4 predecessors, enabling faster data movement between CPU and memory subsystems for compute-heavy workloads.
• Registered (RDIMM) Architecture: The registered buffer between the memory controller and DRAM chips reduces electrical load on the CPU memory controller, enabling support for higher DIMM counts per channel and improved signal integrity at high speeds.
• ECC Error Correction: DDR5 incorporates on-die ECC as a baseline, supplemented by the RDIMM's system-level ECC support, protecting critical enterprise data from silent data corruption caused by random bit errors — essential for financial, healthcare, and mission-critical applications.
• Improved Power Efficiency: DDR5 operates at 1.1V versus DDR4's 1.2V, reducing per-module power consumption. At scale across hundreds of servers, this translates into meaningful reductions in PUE and total data centre operational costs.
• SK Hynix Enterprise-Grade Manufacturing: Produced by one of the top three global DRAM manufacturers, this module undergoes rigorous validation and quality assurance processes, ensuring consistent performance, long operational lifespan, and compatibility with major server OEM platforms.
• Optimised for AI & HPC Workloads: The combination of extreme bandwidth and high capacity makes this DIMM ideal for AI model serving, scientific simulation, genomics, and financial modelling where large datasets must reside entirely in-memory.
• Standards Compliant: Conforms to JEDEC DDR5 RDIMM specifications, ensuring broad interoperability across certified server platforms and simplifying qualification and procurement processes for enterprise IT teams.

Technical Architecture

The HMCT04MKBRC is built on SK Hynix's advanced DDR5 DRAM die technology, assembled in a 288-pin RDIMM form factor that is electrically and physically distinct from DDR4, requiring compatible DDR5 memory slots. The module features a registered clock driver (RCD) — a dedicated logic chip that re-drives the command, address, and clock signals from the host memory controller. This buffering architecture is what distinguishes RDIMMs from unbuffered (UDIMM) modules and is the foundation for supporting the high DIMM counts typical of dual-socket enterprise servers.

DDR5 introduces several architectural advancements over DDR4. Each DDR5 DIMM contains two independent 32-bit sub-channels (rather than a single 64-bit channel), allowing for improved memory access parallelism. This design increases effective bandwidth and reduces latency penalties associated with memory access conflicts. The module's 7200 MT/s data rate is achieved through precise signal conditioning, advanced DRAM cell optimisation, and the use of high-quality PCB substrate materials that maintain signal integrity at extreme frequencies.

On-die ECC (ODECC) is embedded within the DDR5 DRAM dies themselves, providing a first layer of error correction at the chip level before data even reaches the system memory controller. When combined with the server's SECDED (Single Error Correct, Double Error Detect) ECC capability at the DIMM level, this dual-layer protection mechanism significantly reduces the risk of uncorrectable memory errors — a critical requirement in 24/7 production server environments.

Performance & Capacity

With a 128GB capacity per module and a DDR5-7200 operating speed, the HMCT04MKBRC delivers theoretical peak bandwidth in the range of 57.6 GB/s per module when operating in a dual-channel configuration with a matched pair. In systems leveraging eight or more channels — such as those based on Intel Xeon Scalable (Sapphire Rapids / Granite Rapids) or AMD EPYC Genoa/Bergamo platforms — aggregate memory bandwidth can exceed 460 GB/s per socket, enabling AI inference, large-scale OLAP queries, and simulation workloads that previously required specialised accelerator memory.

For virtualisation environments, a dual-socket server populated with 24 of these 128GB modules achieves 3TB of total RAM, supporting hundreds of virtual machines or containers with generous memory allocations per instance. In-memory database platforms such as SAP HANA, Redis Enterprise, and Oracle TimesTen benefit directly from this density, allowing entire production datasets to reside in RAM and eliminating disk I/O as a latency source entirely.

Memory latency at DDR5-7200 speeds is tightly controlled through the JEDEC-specified CAS latency timings appropriate for this speed grade, ensuring that the performance gains from higher clock rates translate into real-world application throughput improvements rather than being negated by excessive latency penalties.

Compatibility & Integration

The SK Hynix 128GB DDR5-7200 RDIMM is designed for compatibility with next-generation enterprise server platforms that support DDR5 memory. Compatible CPU ecosystems include Intel Xeon Scalable processors (5th Generation, codenamed Emerald Rapids, and subsequent generations) and AMD EPYC 9000-series (Genoa, Bergamo, Siena) processors, both of which natively support DDR5 RDIMM operation across multiple memory channels per socket.

• Compatible with major server OEM platforms from HPE, Dell Technologies, Lenovo, Supermicro, Inspur, H3C, and Fujitsu that have qualified DDR5 RDIMM support in their system BIOS/UEFI.
• Conforms to JEDEC DDR5 RDIMM standards (JESD79-5 series), ensuring broad interoperability.
• Supports operation in single, dual, and quad-rank configurations depending on platform memory controller capabilities.
• Compatible with all major hypervisors including VMware vSphere, Microsoft Hyper-V, and KVM-based platforms.
• Validated for use with Linux distributions (RHEL, Ubuntu Server, SUSE) and Windows Server operating systems.
• Designed to operate within standard server environmental specifications: 0°C to 85°C operating range, compliant with RoHS environmental directives.

Ideal Use Cases

• AI & Machine Learning Training: Large language model (LLM) training and inference requires massive memory bandwidth and capacity to hold model weights, activation data, and training batches in-memory. This 128GB DDR5-7200 RDIMM is an essential complement to GPU accelerators in AI server builds.
• High-Density Server Virtualisation: VMware vSphere, Nutanix AHV, and OpenStack environments benefit enormously from high per-server RAM capacity, allowing more VMs per host, reducing licensing costs, and improving consolidation ratios.
• In-Memory Databases & Real-Time Analytics: Platforms such as SAP HANA, Redis, MemSQL (SingleStore), and Apache Ignite require terabytes of RAM to deliver sub-millisecond query responses on large datasets. High-density RDIMMs make this economically viable.
• High-Performance Computing (HPC) & Scientific Simulation: Computational fluid dynamics, molecular dynamics, climate modelling, and genomic sequencing workloads benefit from both the high memory bandwidth of DDR5-7200 and the large working set capacity of 128GB modules.
• Cloud & Hyperscale Infrastructure: Public and private cloud providers building out compute nodes for IaaS offerings require maximum memory density to maximise billable vCPU-to-RAM ratios and reduce the total number of physical servers required.
• Financial Services & Risk Analytics: Monte Carlo simulations, real-time risk calculation engines, and high-frequency trading platforms demand both low latency and large memory footprints — use cases where DDR5 RDIMM at this density excels.
• ERP & Business Intelligence: Large-scale SAP, Oracle ERP, and Microsoft SQL Server deployments running complex business intelligence queries against multi-terabyte databases gain significant performance improvements from expanded and faster server memory.

Why Buy from Omnixon

Omnixon Global is a trusted B2B IT hardware distributor headquartered in Dubai, UAE, serving enterprise and government clients across the GCC region and internationally. Our inventory of high-performance server memory, including DDR5 RDIMMs like the SK Hynix 128GB DDR5-7200, is maintained in-region to support the infrastructure projects of data centres, system integrators, cloud providers, and enterprise IT departments across Saudi Arabia, the UAE, Qatar, Kuwait, Bahrain, Oman, and beyond. By sourcing from Omnixon, enterprise procurement teams gain access to genuine, brand-new components backed by our commitment to product authenticity and quality verification. Our technical team understands the compatibility requirements of complex server environments and can assist with platform validation, configuration guidance, and bulk procurement support — making Omnixon a strategic partner for your infrastructure scaling initiatives rather than simply a transactional vendor.

Related Products & Ecosystem

Building a complete, high-performance server memory configuration requires more than individual DIMMs. Omnixon offers a comprehensive ecosystem of complementary products to support your infrastructure build-out. Consider pairing this SK Hynix 128GB DDR5-7200 RDIMM with enterprise CPUs from Intel Xeon or AMD EPYC families available in our CPU category, or explore our Servers category for complete rack-mount and blade server systems pre-validated for DDR5 operation. For storage complementing your memory-rich servers, our Enterprise SSDs and Enterprise HDDs categories feature NVMe, SAS, and SATA options from leading brands. High-density memory configurations also demand robust network connectivity — browse our Network Adapters & NICs and Network Switches categories for 25GbE, 100GbE, and 400GbE solutions. Complete your data centre build with rack infrastructure from our Server Racks & Enclosures category and power protection solutions from our UPS & Power Protection range.