Samsung 128GB DDR5 RDIMM M321RAJA0MB2-CWM

Brand: Samsung | Category: Memory (RAM)

SKU: SAM-M321RAJA0MB2CWM | Part #: M321RAJA0MB2-CWM | MPN: M321RAJA0MB2-CWM

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Samsung's 128GB DDR5 RDIMM module, designated M321RAJA0MB2-CWM, operates at 5600 Mbps with a remarkably low 1.1V supply voltage—a combination that delivers both performance and efficiency for demanding server environments. The low operating voltage is particularly significant for data centre operators managing power budgets across hundreds or thousands of nodes; every tenth of a volt compounds into measurable savings at scale. The CAS latency and voltage profile make this Samsung memory suitable for latency-sensitive workloads including high-frequency trading systems, in-memory databases like Redis and Memcached, and real-time analytics platforms where nanoseconds matter.

This is a registered DIMM built on the 288-pin JEDEC DDR5 standard, meaning it carries on-die error correction and operates as a 4-rank module with 72-bit data width (including ECC). Infrastructure teams—particularly storage architects and data centre managers responsible for large-scale deployments—select Samsung memory of this calibre when they need both capacity and reliability without accepting latency penalties. The M321RAJA0MB2-CWM fits naturally into dual-socket server platforms from AMD EPYC and Intel Xeon families, where its 128GB capacity per module allows dense memory configurations on a single system. Samsung has engineered this module to remain stable across the full 0°C to 85°C operating range, critical for both air-cooled and liquid-cooled data centre environments.

At 128GB per DIMM, this Samsung product reduces the number of physical slots consumed in a server build, which translates to lower complexity in memory population, fewer potential points of failure, and simpler firmware tuning during platform qualification. The 4-rank architecture supports high-frequency operation without requiring exotic cooling or exotic voltage margins; the conservative 1.1V specification reflects Samsung's confidence in the silicon quality and the design margin built into these modules. For organisations running virtualisation stacks, containerised workloads, or distributed databases that demand low-latency memory access, the DDR5-5600 speed combined with registered ECC protection offers a practical middle ground between raw speed and operational safety.

Procurement teams and network engineers typically compare DDR5 RDIMM options on three axes: capacity per module, frequency-to-latency ratio, and power efficiency. The M321RAJA0MB2-CWM scores well across all three. Its 1.1V operating voltage places it at the efficiency end of the DDR5-5600 market; modules with identical speed at higher voltage exist, but they consume more power without delivering measurably better latency. Samsung's RoHS compliance and JEDEC standard adherence ensure compatibility across multiple OEM platforms and simplify procurement for enterprises with strict environmental and standards governance. The part number M321RAJA0MB2-CWM has become a standard recommendation from system integrators when customers ask for a reliable, high-capacity memory solution for next-generation server refreshes.

Omnixon Global stocks the Samsung M321RAJA0MB2-CWM as part of our core memory portfolio, with reliable availability across the UAE, GCC, and broader Asian distribution channels. Whether you are outfitting a new data centre in Dubai, expanding AI infrastructure in Saudi Arabia, or refreshing server memory across multiple sites, our technical team can assist with compatibility verification, volume pricing, and coordinated logistics. Request a quote for this module or discuss your broader memory and storage requirements with our sales team today.

Performance Specifications and Deployment Suitability

• Capacity: 128GB per DIMM, enabling dense server memory configurations with fewer physical modules
• Speed and Latency: DDR5-5600 with 1.1V operating voltage—optimised for latency-sensitive workloads including in-memory databases and real-time analytics
• Error Correction: On-die ECC with 72-bit data path, protecting against single-bit errors in enterprise and data centre deployments
• Form Factor: RDIMM (Registered DIMM) with 288-pin JEDEC standard, compatible with dual-socket AMD EPYC and Intel Xeon platforms
• Thermal and Operational Range: Rated 0°C to 85°C with stable 4-rank architecture, suitable for both air-cooled and liquid-cooled environments
• Standards Compliance: JEDEC DDR5 standard and RoHS compliant, simplifying procurement and cross-platform qualification
• Part Number: M321RAJA0MB2-CWM—a common specification reference in OEM server builds and enterprise memory upgrade programmes