Samsung 32GB 6400MHz DDR5 PC5-51200 ECC Registered CL 288-Pin DIMM 1.1V Dual Rank x4 Memory Module – M321R4GA3PB2-CCPWC

Samsung 32GB DDR5 6400MHz ECC Registered Server Memory — M321R4GA3PB2-CCPWC

The Samsung M321R4GA3PB2-CCPWC is a 32GB DDR5 ECC Registered (RDIMM) server memory module operating at 6400MHz (PC5-51200) with 1.1V operating voltage. Built on Samsung”s advanced DDR5 architecture, this module delivers the highest DDR5 memory bandwidth available — making it ideal for the most demanding enterprise workloads including large-scale virtualization, in-memory databases, AI/ML inference, and high-performance computing. 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 next-generation enterprise server platforms.

Key Features

• 6400MHz DDR5 — Peak Performance: Highest DDR5 speed tier delivering maximum memory bandwidth for the most demanding enterprise 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: M321R4GA3PB2-CCPWC
• Manufacturer: Samsung
• Memory Type: DDR5 SDRAM
• Module Type: RDIMM (Registered / Buffered)
• Capacity: 32GB
• Speed: 6400MHz (PC5-51200)
• 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 at peak bandwidth
• HPC Clusters: MPI-based scientific computing and simulation workloads requiring peak inter-node memory throughput

Compatibility

• Compatible with DDR5 RDIMM slots supporting 6400MHz — verify your platform”s maximum supported DDR5 speed before ordering
• CCPWC 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

How does PC5-51200 (6400MHz) compare to PC5-44800 (5600MHz) and PC5-38400 (4800MHz)?

PC5-51200 delivers approximately 14% higher peak bandwidth than PC5-44800 and 33% higher than PC5-38400, making it the top DDR5 speed tier for bandwidth-critical enterprise workloads — provided your server platform supports 6400MHz DDR5.

What does the CCPWC qualification suffix indicate?

Samsung uses qualification suffixes to denote OEM validation, regional certification, or specific server vendor testing. CCPWC 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 lower speeds if my server does not support 6400MHz?

DDR5 modules are backward speed-compatible — if your server platform does not support 6400MHz, 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 M321R4GA3PB2-CCPWC delivers the 32GB DDR5 6400MHz bandwidth, dual-layer ECC protection, and Samsung manufacturing quality your enterprise server infrastructure demands.