Samsung 32GB DDR5 4800MHz ECC Registered Server Memory — M321R4GA3BB6-CQKDG

The Samsung M321R4GA3BB6-CQKDG is a 32GB DDR5 ECC Registered (RDIMM) server memory module operating at 4800MHz (PC5-38400) with CAS latency CL40 and 1.1V operating voltage. Built on Samsung's advanced DDR5 architecture, it delivers significantly higher memory bandwidth and improved power efficiency compared to DDR4 — 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

• Next-Gen DDR5 Standard: Higher bandwidth and 20% better power efficiency than DDR4 — future-proof your server infrastructure
• 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: M321R4GA3BB6-CQKDG
• Manufacturer: Samsung
• Memory Type: DDR5 SDRAM
• Module Type: RDIMM (Registered / Buffered)
• Capacity: 32GB
• Speed: 4800MHz (PC5-38400)
• CAS Latency: CL40
• Timing: 40-39-39
• 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 high memory bandwidth per core
• In-Memory Databases: SAP HANA, Oracle TimesTen, and Redis clusters demanding large, fast memory pools
• 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 maximum inter-node memory throughput

Compatibility

• Compatible with DDR5 RDIMM slots only — not backward compatible with DDR4 platforms
• CQKDG 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

How does DDR5 on-die ECC differ from system-level ECC?

On-die ECC corrects errors within the DRAM chip itself before data reaches the memory bus — reducing raw bit error rates. System-level ECC then provides an additional layer of SECDED correction at the memory controller, giving DDR5 RDIMMs dual-layer protection not available in DDR4.

What does the CQKDG qualification suffix indicate?

Samsung uses qualification suffixes to denote OEM validation, regional certification, or specific server vendor testing. CQKDG 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 maximum memory capacity supported per channel with this module?

DDR5 supports two sub-channels per DIMM slot, each operating at 32-bit width. With dual-rank x8 organization, this module maximizes per-channel bandwidth — consult your server platform's memory population guide for maximum supported capacity per channel.

Whether you are scaling a virtualization cluster, accelerating in-memory database performance, or building out an AI inference platform, the Samsung M321R4GA3BB6-CQKDG delivers the DDR5 bandwidth, dual-layer ECC protection, and Samsung manufacturing quality your enterprise server infrastructure demands.