Samsung 16GB DDR5 5600MHz ECC Registered Server Memory — M321R2GA3PB0-CWMXJ

The Samsung M321R2GA3PB0-CWMXJ is a 16GB DDR5 ECC Registered (RDIMM) server memory module operating at 5600MHz (PC5-44800) with CAS latency CL46 and 1.1V operating voltage. Built on Samsung's DDR5 x8 die architecture, this Single Rank module delivers next-generation DDR5 memory bandwidth for enterprise server workloads including virtualization, databases, and general-purpose computing. DDR5 introduces on-die ECC (ODECC) for enhanced per-chip error detection, complemented by system-level ECC for comprehensive data integrity protection. The registered (buffered) design reduces electrical load on the memory controller, enabling stable multi-DIMM configurations across next-generation enterprise server platforms.

Key Features

• DDR5 Next-Generation Platform: Higher bandwidth, improved power efficiency, and on-die ECC versus DDR4 for modern enterprise server deployments
• 5600MHz Performance: PC5-44800 delivers strong DDR5 memory bandwidth for a wide range of enterprise server workloads
• Dual-Layer ECC: On-die ECC (ODECC) plus system-level ECC provides comprehensive error detection and correction
• Registered (Buffered) Design: Enables stable, multi-DIMM server configurations without signal degradation
• Samsung DRAM: Industry-leading manufacturing quality with proven enterprise-grade reliability and longevity

Technical Specifications

• Part Number: M321R2GA3PB0-CWMXJ
• Manufacturer: Samsung
• Memory Type: DDR5 SDRAM
• Module Type: RDIMM (Registered / Buffered)
• Capacity: 16GB
• Speed: 5600MHz (PC5-44800)
• CAS Latency: CL46
• Voltage: 1.1V
• Form Factor: 288-Pin DIMM
• Rank: Single Rank (1Rx8)
• Die Organization: x8
• Data Width: 72-bit (64-bit + 8-bit ECC)
• Error Correction: On-Die ECC + SECDED system-level ECC
• Operating Temperature: 0°C to 85°C

Use Cases

• Virtualization: VMware vSphere, Microsoft Hyper-V, and KVM deployments on DDR5 server platforms
• Database Servers: MySQL, PostgreSQL, Microsoft SQL Server, and Oracle database workloads on next-generation DDR5 platforms
• General-Purpose Computing: Enterprise application servers and web servers on DDR5 platforms requiring reliable ECC memory
• DDR5 Platform Deployment: Entry-capacity DDR5 RDIMM for new server deployments requiring DDR5 compatibility

Compatibility

• Compatible with DDR5 RDIMM slots only — not compatible with DDR4 platforms
• CWMXJ suffix denotes specific OEM or regional server vendor qualification — verify against your server's memory QVL before ordering
• Do not mix with DDR5 UDIMMs or LRDIMMs in the same system
• For multi-DIMM stability, populate channels with matched capacity, speed, and rank modules

Frequently Asked Questions

Is this module compatible with DDR4 servers?

No — DDR5 and DDR4 are not interchangeable. DDR5 RDIMMs require DDR5-compatible server platforms. Always verify your server's memory type requirement before ordering.

What does the CWMXJ qualification suffix indicate?

Samsung uses qualification suffixes to denote OEM validation, regional certification, or specific server vendor testing. CWMXJ identifies this module's exact qualification tier — always cross-reference with your server vendor's memory compatibility or QVL list before purchase.

What is the advantage of Single Rank versus Dual Rank for 16GB DDR5?

Single Rank modules have lower electrical load per channel, which can allow more DIMMs per channel on some platforms. Dual Rank modules can offer higher bandwidth through rank interleaving. Always verify your server platform's rank support and per-channel DIMM limits in the QVL before ordering.

Whether you are deploying new DDR5 server infrastructure, expanding virtualization capacity, or upgrading database server platforms to next-generation memory, the Samsung M321R2GA3PB0-CWMXJ delivers the 16GB DDR5 5600MHz performance, dual-layer ECC protection, and Samsung manufacturing quality your enterprise server environment demands.