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Samsung M321R2GA3BB6-CQKMG 16GB DDR5 RDIMM 4800MHz | Registered ECC

MPN:M321R2GA3BB6-CQKMG By:Samsung Warranty:1 year
US$794 - $861
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General

Product TypeMemory Module
Compliance StandardsRoHS,WEEE
Memory Capacity16 GB
Memory TechnologyDDR5
Product Voltage1.1 V
RAM Speed4800 MHz
RAM StandardDDR5-4800/PC5-38400
Error IdentifyingECC
Signal TypeRegistered
Column Access Strobe (CAS)CL40
RankSingle Rank x8
Quantity of Pins288-pin
RAM GenreRDIMM

Engineer's Note

This is a DDR5-4800 Registered DIMM (RDIMM) with ECC, purpose-built for server platforms handling virtualization, in-memory databases, and other mission-critical workloads that demand data integrity and sustained uptime. The single-rank x8 configuration combined with registered signaling reduces electrical loading on the memory bus, enabling stable operation in high-density multi-DIMM configurations while the integrated ECC engine corrects single-bit errors in real time.

Technical Specs & Insights

1. The DDR5 memory technology doubles the prefetch depth, delivering the massive bandwidth required for next-gen server processors to handle concurrent data analytics without bottlenecks.
2. A 16-gigabyte capacity per module maximizes memory density in a standard server node, significantly boosting virtual machine density for enterprise consolidation.
3. ECC protection detects and corrects single-bit errors in real time, preventing silent data corruption across long-running in-memory databases and critical financial workloads.
4. The registered signal type uses a command/address buffer to stabilize high-capacity configurations, ensuring reliable operation even when all DIMM slots are fully populated in a rack server.
5. Operating at 4800 megatransfers per second, this module accelerates memory-intensive tasks such as real-time inference and large-scale virtualization, shrinking response latency under heavy multi-tenant loads.

Why These Specs Matter

This memory module is a server-grade DDR5 Registered DIMM with ECC, purpose-built for data centers where reliability and scale are non-negotiable. For IT architects managing virtualized clusters, the on-die ECC delivers immediate, tangible protection: it detects and corrects single-bit flips caused by background radiation, preventing silent data corruption that could crash dozens of virtual machines or corrupt financial transactions mid-processing. That means true workload continuity without unexplained service disruptions. The registered buffer, or register, directly tackles the challenge of scaling capacity. It isolates the memory controller from excessive electrical loads, so you can fully populate every channel with high-density modules and maintain signal integrity—essential for in-memory databases like Redis or SAP HANA, where terabytes of stable, error-free RAM directly determine real-time query performance and user experience. With DDR5-4800 speed delivering 38.4 GB/s of bandwidth, the module keeps multi-core CPUs fed during heavy parallel analytics queries, while the single-rank x8 organization minimizes rank switching latency under virtualized, multi-tenant environments. In practice, this translates into consistent low-latency response for your virtualization hosts and the headroom to run larger memory databases without compromising stability. For the server operator, it means fewer late-night emergencies and predictable performance at scale.

Endurance & Reliability

General Virtualization
For a standard hypervisor hosting mixed VMs, a balanced approach using 8 identical 16GB RDIMMs (128 GB total) across an 8-channel capable platform ensures ample capacity and memory bandwidth. Populate one DIMM per channel to maximize throughput while keeping latency low, leaving room for future expansion.

In-Memory Database
In-memory databases like Redis or SAP HANA demand massive capacity and fault tolerance. Deploy 16 or more 16GB ECC RDIMMs for 256 GB+, fully populating all memory channels to sustain extreme throughput. Strictly match all modules to avoid any signal integrity issues, as in-memory workloads punish even minor timing discrepancies.

High-Performance Computing (HPC)
HPC clusters require high bandwidth and rock‑solid stability. Configure 8 to 16 identical 16GB Registered ECC modules, filling every memory channel symmetrically for peak interconnect performance. This setup eliminates bottlenecks in parallel file systems and MPI communication, while ECC scrubs silent data corruption across long-running simulations.

Verified Compatibility

Rigorously tested server memory, compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen11, Lenovo ThinkSystem SR650 V3.

FAQ

Q: Can I mix this M321R2GA3BB6-CQKMG with other memory modules of different brands or speeds?

A: Mixing different brands or speeds on a server platform is not recommended. The memory controller will default to the lowest common speed, and mixed Registered DIMMs may cause POST failures or instability.

Q: Is this memory compatible with my system?

A: This DDR5 ECC Registered RDIMM is designed for contemporary server platforms supporting Intel Xeon Scalable (Sapphire Rapids and later) or AMD EPYC 7003/9004 series. Verify with your system's qualified vendor list.

Q: What is the recommended DIMM population order for optimal performance?

A: Populate equal DIMMs per memory channel, typically starting with the farthest slot from the CPU per channel. Follow the platform-specific balance and symmetry guidelines in your server’s manual for best throughput.

Q: Does this module support overclocking or XMP profiles?

A: No, this is an ECC Registered server DIMM operating at JEDEC standard DDR5-4800 CL40. It does not support XMP or overclocking, prioritizing stability and data integrity for enterprise workloads.

Q: What warranty and typical failure rate can I expect?

A: This Samsung memory carries a 1-year warranty. The Annualized Failure Rate (AFR) is typically under 0.5% for genuine server-grade RDIMMs, ensuring high reliability in 24/7 data center environments.

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