Samsung DDR5 128GB RDIMM Server Memory Module M321RYAIA0MB2-CCP 4800MHz ECC

Brand: Samsung | Category: Memory (RAM)

SKU: M321RYAIA0MB2-CCP | Part #: M321RYAIA0MB2-CCP | MPN: M321RYAIA0MB2-CCP

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Product Overview

The Samsung DDR5 128GB RDIMM Module (M321RYAIA0MB2-CCP) represents a landmark advance in enterprise server memory technology. As one of the highest-capacity single-module DDR5 RDIMMs available on the commercial market, this module delivers exceptional memory bandwidth, on-die ECC, and registered buffering — making it an indispensable component for organisations pushing the boundaries of compute-intensive workloads. Built on Samsung's industry-leading DRAM fabrication process, this module is designed for deployment in enterprise-grade servers, hyperscale cloud nodes, and AI/ML acceleration platforms where memory capacity and throughput are mission-critical.

DDR5 represents a generational leap over DDR4, doubling the peak data rate, splitting the command bus to reduce congestion, and integrating on-module power management (PMIC) for finer voltage regulation. The M321RYAIA0MB2-CCP embodies all of these advances in a single 128GB package, enabling system architects to build memory-rich configurations with fewer DIMMs, reducing slot pressure and improving thermal management across dense server platforms.

For data centre operators, enterprise IT teams, and cloud service providers across the GCC and worldwide, this Samsung DDR5 RDIMM is a strategic investment in infrastructure that will serve next-generation processor platforms for years to come.

Key Features & Benefits

• Massive 128GB Single-Module Capacity: Populate fewer DIMM slots while achieving extremely high per-node memory totals — critical for in-memory databases, large language models, and virtualisation hosts.
• DDR5 Technology: Leverages the DDR5 standard for significantly increased bandwidth over DDR4, enabling faster data movement between CPU and memory subsystem in compute-intensive environments.
• Registered (Buffered) DIMM Architecture: The RDIMM design uses a register component to buffer address and command signals, enabling greater electrical stability and support for high-DIMM-count configurations in multi-socket enterprise servers.
• On-Die ECC (Error Correcting Code): Samsung's DDR5 on-die ECC corrects single-bit errors within the DRAM array before data reaches the memory controller, substantially reducing the soft error rate and improving system reliability in 24/7 enterprise environments.
• On-Module PMIC (Power Management IC): DDR5 relocates power regulation from the motherboard to the DIMM itself, delivering cleaner, more precise voltage to the DRAM array and enabling more granular power management per module.
• Enterprise-Grade Reliability: Manufactured in Samsung's own semiconductor fabs to the highest quality standards, with rigorous burn-in and testing protocols ensuring consistent performance across the operational lifetime of each module.
• Thermal Optimisation: Designed with a low-profile PCB and thermal spreader-compatible footprint to suit high-density rack configurations where airflow management is essential.
• Backwards-Compatible Ecosystem Design: While DDR5 requires DDR5-capable platforms, the RDIMM form factor follows JEDEC standards, ensuring broad compatibility across major server OEM platforms supporting DDR5 memory.

Technical Architecture

The M321RYAIA0MB2-CCP is engineered around Samsung's advanced DRAM die stack technology, utilising high-density DRAM dies to achieve 128GB within the standard 288-pin RDIMM form factor. The module operates with dual 32-bit sub-channels per DDR5 DIMM — a fundamental architectural change from DDR4 — effectively doubling memory channel parallelism and improving command efficiency under mixed read/write workloads.

The registered buffer (RCD) on this DIMM intercepts address and command signals from the memory controller, re-driving them with clean, strong signal integrity to all DRAM components on the module. This buffering is what distinguishes RDIMMs from UDIMMs and is essential for multi-DIMM-per-channel configurations found in enterprise servers. The module also features SPD (Serial Presence Detect) with EEPROM to communicate module parameters to the host system BIOS/firmware for automatic configuration and optimisation.

Power delivery is handled via a dedicated on-module PMIC, a DDR5 requirement that moves voltage regulation off the motherboard VRM and onto the module. This provides tighter voltage tolerances of 1.1V VDD, reducing dynamic power variation and improving signal integrity at high data rates. The module's advanced PCB uses multiple layers with controlled impedance routing to maintain signal integrity at DDR5 speeds.

Performance & Capacity

Operating at a base data rate of 4800 MT/s (mega-transfers per second) per the JEDEC DDR5-4800 specification, this module delivers a theoretical peak bandwidth of approximately 38.4 GB/s per channel. In dual-channel and multi-channel server configurations, aggregate memory bandwidth scales proportionally, enabling platforms with multiple memory channels per CPU to sustain hundreds of GB/s of aggregate memory throughput — a critical factor for bandwidth-bound workloads such as HPC simulations, AI inference, and large-scale data analytics.

With 128GB per module, a two-socket server with 16 DIMM slots per socket can theoretically achieve up to 4TB of system memory using only a portion of available slots — providing substantial headroom for virtual machine density, in-memory dataset loading, and future memory expansion. This per-module density also reduces the number of active DRAM ranks the memory controller must manage, potentially improving memory controller efficiency and reducing latency in certain access patterns.

Latency characteristics follow the DDR5 standard with CAS latencies specified per JEDEC profiles, balancing bandwidth and access latency for general-purpose enterprise use. Platform-specific XMP or JEDEC profiles may allow for further tuning in supported server BIOS environments.

Compatibility & Integration

The Samsung M321RYAIA0MB2-CCP is designed to operate with server platforms built around Intel Xeon Scalable (Sapphire Rapids and later) and AMD EPYC (Genoa and later) processors, both of which require DDR5 memory. The RDIMM form factor is the standard for enterprise and workstation-class server motherboards and is supported by major server OEMs including Dell EMC PowerEdge, HPE ProLiant, Lenovo ThinkSystem, Supermicro, and others with DDR5 RDIMM-compatible memory slots.

• Form Factor: 288-pin RDIMM (DDR5)
• Voltage: 1.1V (VDD/VDDQ), managed via on-module PMIC
• JEDEC DDR5 compliant — standard SPD profiles supported
• Compatible with Intel Xeon Scalable 4th/5th Gen (Sapphire Rapids, Emerald Rapids) platforms
• Compatible with AMD EPYC 4th Gen (Genoa/Bergamo) platforms
• Supported by major hypervisors: VMware vSphere, Microsoft Hyper-V, Red Hat KVM
• Registered (buffered) architecture — not compatible with UDIMM-only slots
• RoHS compliant; manufactured to international environmental standards

Ideal Use Cases

• AI & Machine Learning Training Infrastructure: Large-scale AI model training requires massive memory bandwidth and capacity to feed GPU accelerators and keep training pipelines saturated. High-capacity DDR5 RDIMMs reduce memory bottlenecks in GPU server nodes.
• In-Memory Databases & OLAP Analytics: Platforms such as SAP HANA, Oracle TimesTen, and Redis thrive when entire datasets reside in system RAM. 128GB RDIMMs enable terabyte-class in-memory database configurations with fewer modules.
• High-Density Virtual Machine Hosting: Enterprise virtualisation platforms benefit directly from high per-server memory totals. More RAM per host means more VMs per physical node, reducing hardware footprint and licensing costs.
• High Performance Computing (HPC) & Scientific Simulation: CFD, molecular dynamics, genomics, and climate modelling workloads are inherently memory-bandwidth-intensive, making DDR5's increased throughput a tangible performance advantage.
• Cloud & Hyperscale Infrastructure: Cloud service providers building multi-tenant platforms require maximising memory per node to improve consolidation ratios, reduce TCO, and meet SLA commitments for memory-intensive customer workloads.
• Real-Time Data Streaming & Event Processing: Platforms running Apache Kafka, Flink, or Spark Streaming benefit from large memory pools to buffer high-throughput event streams and reduce disk I/O dependency.
• Containerised & Kubernetes Workloads: Large container orchestration clusters with many concurrent pods require substantial per-node RAM headroom; 128GB DDR5 RDIMMs support the next generation of Kubernetes worker node configurations.

Why Buy from Omnixon

Omnixon Global is a trusted B2B IT hardware distributor headquartered in Dubai, UAE, with deep expertise in sourcing and supplying enterprise-grade components to clients across the GCC region, including Saudi Arabia, Kuwait, Qatar, Bahrain, Oman, and the UAE, as well as international markets worldwide. Our inventory of Samsung DRAM server modules is maintained in Dubai to serve the region's fast-moving enterprise IT procurement needs, ensuring that critical infrastructure upgrades are not delayed by extended international shipping lead times. Our team of enterprise hardware specialists provides pre-sales technical consultation to help system architects select the right memory configuration for their specific server platform, workload profile, and budget requirements. We serve hyperscale cloud operators, government entities, financial institutions, telecommunications providers, healthcare organisations, and system integrators — all of whom demand the product authenticity, technical accuracy, and supply reliability that Omnixon consistently delivers. Every Samsung DRAM module we supply is sourced through authorised channels and verified for authenticity, giving procurement teams confidence in the integrity of their infrastructure investment.

Related Products & Ecosystem

To build a complete, high-performance server memory infrastructure, consider pairing the Samsung 128GB DDR5 RDIMM with complementary products available from Omnixon's broad portfolio. Enterprise servers from leading OEMs in our Servers category provide the DDR5-capable platforms needed to deploy this module. For storage performance that matches next-generation memory bandwidth, explore our Enterprise SSD range featuring NVMe PCIe Gen 4 and Gen 5 drives. CPU upgrades, including Intel Xeon Scalable and AMD EPYC processors in our CPUs category, are the natural co-investment alongside DDR5 memory upgrades. For high-bandwidth network connectivity to match your upgraded server memory throughput, browse our Network Adapters & NICs and Transceivers & Cables categories featuring 100GbE and 400GbE solutions. Server Racks & Enclosures and Rack PDUs from our infrastructure portfolio complete the physical data centre buildout, while UPS & Power Protection products safeguard your investment against power disruption.