Samsung 32GB DDR5 5600MHz ECC Registered Server Memory — M321R4GA3PB0-CWMKH

The Samsung M321R4GA3PB0-CWMKH is a 32GB 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 advanced DDR5 architecture, it delivers industry-leading memory bandwidth and improved power efficiency — making it ideal for next-generation enterprise servers running virtualization, in-memory databases, AI/ML inference, and high-performance computing workloads. Error-Correcting Code (ECC) technology continuously detects and corrects single-bit memory errors in real time, ensuring data integrity in mission-critical environments. The registered (buffered) design reduces electrical load on the memory controller, enabling stable high-density multi-DIMM configurations across enterprise server platforms.

Key Features

• 5600MHz DDR5 Speed: Higher bandwidth than 4800MHz DDR5 — ideal for the most demanding enterprise server workloads
• On-Die + System-Level ECC: Dual-layer error correction ensures maximum data integrity for mission-critical workloads
• Registered (Buffered) Design: Enables stable, high-density multi-DIMM server configurations without signal degradation
• Samsung DRAM: Industry-leading manufacturing quality with proven enterprise-grade reliability and longevity
• RoHS Compliant: Meets global environmental and safety standards for enterprise deployments

Technical Specifications

• Part Number: M321R4GA3PB0-CWMKH
• Manufacturer: Samsung
• Memory Type: DDR5 SDRAM
• Module Type: RDIMM (Registered / Buffered)
• Capacity: 32GB
• Speed: 5600MHz (PC5-44800)
• CAS Latency: CL46
• Timing: 46-45-45
• Voltage: 1.1V
• Form Factor: 288-Pin DIMM
• Rank: Dual Rank (2Rx8)
• Die Organization: x8
• Data Width: 72-bit (64-bit + 8-bit ECC)
• Error Correction: SECDED (Single-bit correction, Double-bit detection)
• Operating Temperature: 0°C to 85°C

Use Cases

• Virtualization: VMware vSphere, Microsoft Hyper-V, and KVM deployments requiring maximum memory bandwidth per core
• In-Memory Databases: SAP HANA, Oracle TimesTen, and Redis clusters demanding the fastest possible memory throughput
• AI/ML Inference: GPU-adjacent CPU memory for large language model inference and ML pipeline acceleration
• HPC Clusters: MPI-based scientific computing and simulation workloads requiring peak inter-node memory throughput

Compatibility

• Compatible with DDR5 RDIMM slots supporting 5600MHz — verify your platform's maximum supported DDR5 speed before ordering
• CWMKH suffix denotes specific OEM or regional server vendor qualification — verify against your server's memory QVL before ordering
• Do not mix with DDR5 UDIMMs, LRDIMMs, or lower-speed DDR5 modules in the same channel
• For multi-DIMM stability, populate channels with matched capacity, speed, and rank modules

Frequently Asked Questions

What is the difference between PC5-44800 and PC5-38400?

PC5-44800 (5600MHz) delivers approximately 17% higher peak memory bandwidth than PC5-38400 (4800MHz), making it the better choice for bandwidth-sensitive workloads such as HPC, AI inference, and large in-memory databases — provided your server platform supports 5600MHz DDR5.

What does the CWMKH qualification suffix indicate?

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

Can this module run at 4800MHz if my server does not support 5600MHz?

DDR5 modules are backward speed-compatible — if your server platform does not support 5600MHz, the module will typically train down to the platform's maximum supported speed. However, always verify with your server vendor's QVL to confirm supported configurations.

Whether you are scaling a virtualization cluster, accelerating in-memory database performance, or building out an AI inference platform, the Samsung M321R4GA3PB0-CWMKH delivers the DDR5 5600MHz bandwidth, dual-layer ECC protection, and Samsung manufacturing quality your enterprise server infrastructure demands.