Samsung 48GB DDR5-5600 ECC RDIMM Server Memory M321R6GA3PB0-CWM

Brand: Samsung | Category: Memory (RAM)

SKU: M321R6GA3PB0-CWM | Part #: M321R6GA3PB0-CWM

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Product Overview

The Samsung 48GB DDR5-5600 ECC RDIMM (Registered Dual Inline Memory Module) represents a significant advancement in enterprise server memory technology. As data centres and cloud providers push the boundaries of compute density, AI inference, and real-time analytics, the demand for faster, higher-capacity, and more reliable memory has never been greater. Samsung, the world's leading manufacturer of DRAM, delivers exactly that with this module — combining a 48GB asymmetric capacity, DDR5-5600 MT/s transfer rates, on-die ECC (Error Correction Code), and registered buffering into a single, production-ready DIMM designed for mission-critical deployments.

The M321R6GA3PB0-CWM is a 1Rx4 (single-rank, x4 organisation) RDIMM operating on the DDR5 standard, which doubles the memory channels versus DDR4 and introduces significant improvements in power efficiency, data integrity, and raw bandwidth. At 48GB, this module leverages Samsung's advanced 1b-nm DRAM process node, enabling greater cell density without compromising thermal characteristics or signal integrity. It is purpose-built for enterprise server platforms requiring both scale and precision — from hyperscale cloud racks to on-premises AI training clusters.

Shipped brand new in OEM or retail packaging, this module is sourced directly through authorised channels, ensuring genuine Samsung quality and full compatibility with supported server platforms. Omnixon Global stocks this module in Dubai for rapid fulfilment across the UAE, Saudi Arabia, Qatar, Kuwait, Bahrain, Oman, and international enterprise accounts worldwide.

Key Features & Benefits

• DDR5-5600 MT/s Speed: Operating at 5600 megatransfers per second, this module delivers peak theoretical bandwidth of up to 44.8 GB/s per channel — a substantial leap over DDR4-3200, accelerating memory-intensive workloads including AI inference, in-memory databases, and real-time analytics.
• 48GB Asymmetric Capacity: The 48GB density per DIMM allows system architects to achieve extremely high per-socket memory configurations, reducing the number of DIMMs required while maximising total addressable memory — critical for large-scale virtualisation and in-memory computing.
• On-Die ECC (ODECC): Every DDR5 module incorporates on-die error correction at the DRAM cell level, catching and correcting single-bit errors before they propagate to the memory controller. Combined with the RDIMM's system-level ECC, this dual-layer protection dramatically improves data integrity for financial, healthcare, and government workloads.
• Registered (Buffered) Design: The RDIMM architecture uses a Register Clock Driver (RCD) to buffer address and command signals between the memory controller and DRAM chips. This reduces electrical loading on the memory bus, enabling higher DIMM counts per channel and improved signal integrity at high data rates.
• 1Rx4 Organisation: The single-rank, x4 chip-width configuration optimises for capacity density and power efficiency, making it ideal for deployments where thermal headroom and power consumption per rack unit are constrained.
• DDR5 Dual Sub-Channel Architecture: DDR5 introduces two independent 32-bit sub-channels per DIMM (versus DDR4's single 64-bit channel), improving memory access parallelism and reducing latency for multi-threaded workloads such as OLTP databases and containerised microservices.
• Improved Power Efficiency: DDR5 operates at a native voltage of 1.1V, down from DDR4's 1.2V, contributing to measurable reductions in memory subsystem power draw — a critical factor in high-density server configurations aiming to meet sustainability and PUE targets.
• Samsung 1b-nm Process Node: Manufactured on Samsung's advanced 1b-nm DRAM lithography, this module benefits from improved yield, tighter timing tolerances, and enhanced endurance compared to previous-generation memory products.

Technical Architecture

DDR5 represents a fundamental redesign of the DRAM interface standard. Unlike DDR4, where the memory controller managed power delivery externally, DDR5 integrates a Power Management IC (PMIC) directly onto each DIMM. This on-module voltage regulation improves power delivery accuracy, reduces noise, and simplifies motherboard and server board design. The M321R6GA3PB0-CWM incorporates a dedicated PMIC that regulates the multiple voltage rails required by the DRAM array, the register, and the SPD (Serial Presence Detect) hub.

The Serial Presence Detect (SPD) function in DDR5 has been upgraded to a more intelligent SPD Hub (SPD5118), which communicates over an I3C bus rather than the legacy I2C interface used in DDR4. This enables faster and more reliable module identification, thermal sensor polling, and configuration — all critical for system management in dense server environments where BMC (Baseboard Management Controller) visibility into memory health is essential.

The RCD (Registering Clock Driver) on this RDIMM is compliant with the DDR5 RCD02 specification, providing the signal conditioning and buffering necessary to maintain eye diagram integrity at 5600 MT/s data rates across fully populated memory channels. The x4 DRAM organisation means that each DRAM device contributes 4 bits to the data bus, requiring more chips per rank versus x8 devices but enabling superior SDDC (Single Device Data Correction) ECC coverage when paired with the system's memory controller ECC engine.

Performance & Capacity

At DDR5-5600 speed, this module delivers a theoretical peak bandwidth of approximately 44.8 GB/s per DIMM in a single-channel configuration. In a dual-channel or quad-channel server platform (such as those based on Intel Xeon Scalable 4th/5th Generation or AMD EPYC Genoa/Turin), total memory bandwidth can reach 350+ GB/s per socket when fully populated — a critical enabler for large language model (LLM) inference, real-time fraud detection, and high-frequency trading applications.

The 48GB capacity per module allows a standard 2-socket server with 16 DIMM slots (8 per socket) to achieve up to 768GB of total system memory without mixing module densities. For platforms supporting 24 or 32 DIMMs per socket, memory configurations exceeding 1.5TB per socket become achievable, meeting the demands of in-memory databases such as SAP HANA, Oracle TimesTen, and Redis Enterprise at scale.

Latency characteristics under DDR5-5600 are competitive with the platform's memory controller tuning. While DDR5 raw CAS latency (CL) values are numerically higher than DDR4, the increased clock frequency ensures that absolute latency in nanoseconds remains comparable or superior, particularly under high memory bandwidth utilisation conditions typical of HPC and AI workloads.

Compatibility & Integration

The Samsung M321R6GA3PB0-CWM is designed for compatibility with the following enterprise server platforms and processors:

• Intel Xeon Scalable 4th Gen (Sapphire Rapids) and 5th Gen (Emerald Rapids): Both processor generations natively support DDR5-5600 RDIMMs with full ECC capability. Verified compatible with Dell PowerEdge, HPE ProLiant Gen11, Lenovo ThinkSystem, Supermicro, and Inspur platforms based on these CPUs.
• AMD EPYC 9004 Series (Genoa) and 9005 Series (Turin): AMD's Zen 4 and Zen 5 EPYC processors support DDR5-5600 RDIMMs across their 12-channel memory subsystem, enabling industry-leading per-socket memory bandwidth for data analytics and AI training.
• JEDEC DDR5 Standard Compliance: Fully compliant with JEDEC JESD79-5B, ensuring interoperability with any DDR5-compatible platform and memory controller.
• Operating System Support: Compatible with all major enterprise operating systems including Red Hat Enterprise Linux, SUSE Linux Enterprise Server, Ubuntu Server LTS, VMware vSphere ESXi, Microsoft Windows Server, and container platforms including Kubernetes distributions.
• RAS Feature Support: Supports Patrol Scrub, Memory Mirroring, Memory Rank Sparing, and Post Package Repair (PPR) when enabled by the host platform's memory controller — essential for Tier-1 uptime requirements in financial and healthcare environments.

Ideal Use Cases

• AI & Machine Learning Training: Large-scale neural network training workloads require sustained, high-bandwidth memory access to feed GPU and CPU compute engines. High-capacity DDR5 RDIMMs reduce the frequency of memory-bound stalls, improving GPU utilisation and reducing time-to-train for transformer models and computer vision pipelines.
• In-Memory Database Deployments: SAP HANA, VoltDB, MemSQL (SingleStore), and similar in-memory analytics platforms store entire datasets in DRAM for sub-millisecond query response times. The 48GB density per module enables larger hot datasets to remain in memory, reducing I/O bottlenecks.
• High-Density Server Virtualisation: VMware vSphere, Microsoft Hyper-V, and KVM hypervisors benefit from larger per-host memory pools. With 48GB DIMMs, IT administrators can run significantly more VMs per physical host, improving consolidation ratios and reducing hardware footprint and licensing costs.
• OLAP & Real-Time Analytics: Business intelligence platforms, columnar databases (Snowflake on-prem, ClickHouse, Apache Doris), and streaming analytics engines (Apache Flink, Kafka Streams) require high memory throughput to process large in-flight datasets. DDR5-5600 ensures these platforms operate at full throughput without memory subsystem bottlenecks.
• HPC & Scientific Computing: Finite element analysis, computational fluid dynamics (CFD), genomics sequencing pipelines, and seismic processing workloads are characterised by large memory footprints and irregular access patterns. High-bandwidth, high-capacity DDR5 RDIMMs directly accelerate time-to-result for these compute-intensive applications.
• Cloud & Hyperscale Infrastructure: Cloud service providers deploying high-density compute nodes benefit from the improved power efficiency and capacity-per-slot of DDR5-5600, reducing the number of nodes required per rack and improving overall rack power and cooling economics.
• Edge AI Inference Servers: Compact edge servers deployed in telecommunications, retail, and industrial environments increasingly require enterprise-grade memory reliability combined with the performance headroom of DDR5 to run multiple concurrent AI inference models in real time.

Why Buy from Omnixon

Omnixon Global is a trusted B2B IT hardware distributor headquartered in Dubai, UAE, serving enterprise clients across the GCC region — including Saudi Arabia, Qatar, the UAE, Kuwait, Bahrain, and Oman — as well as international accounts across Europe, Africa, and Asia. Our inventory includes genuine, brand-new Samsung memory modules sourced through verified supply channels, ensuring authenticity and compliance with corporate procurement standards. Our Dubai-based stock enables fast regional fulfilment with the documentation, invoicing, and customs support that enterprise and government procurement teams require. Our technical sales team is equipped to assist with memory compatibility verification, server platform qualification, and bulk configuration planning — ensuring that your memory upgrade or new deployment is correctly specified from the outset. Whether you are procuring a single module for a critical server upgrade or placing a high-volume order for a data centre build-out, Omnixon provides the responsiveness, product knowledge, and regional logistics expertise that enterprise IT projects demand.

Related Products & Ecosystem

To complete your server memory refresh or new deployment, Omnixon also supplies a comprehensive range of complementary enterprise hardware categories. Pair this Samsung DDR5 RDIMM with Intel Xeon Scalable or AMD EPYC processors from our CPUs category for a fully optimised server platform. Explore our Servers range for Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem, and Supermicro platforms natively supporting DDR5-5600. For storage to complement high-memory AI and analytics servers, our Enterprise SSDs range includes NVMe U.2 and E3.S drives offering the sequential bandwidth needed to feed DDR5-class memory subsystems. Our Network Adapters & NICs and Network Switches categories cover the high-speed Ethernet and InfiniBand interconnects required to build out complete AI training clusters and hyperconverged infrastructure. For power protection and rack infrastructure supporting your server deployments, browse our UPS & Power Protection and Server Racks & Enclosures categories.