General

Engineer's Note

Designed for server-class platforms, this Samsung 16GB DDR5-4800 Registered DIMM (M321R2GA3BB6-CQKET) with ECC ensures data integrity in mission-critical workloads such as virtualization and in-memory databases. Its registered signal type and single-rank x8 organization enhance signal stability and memory bus efficiency, enabling higher population densities while maintaining a low CL40 latency at 1.1V.

Technical Specs & Insights

1. 16GB capacity per module provides sufficient headroom for memory-hungry virtualization hosts, allowing more VMs per server without hitting swap.
2. DDR5 technology doubles the burst length and improves channel efficiency, directly accelerating in-memory databases and real-time analytics.
3. 4800MT/s transfer rate ensures high throughput for data-intensive workloads, reducing latency in large-scale AI training pipelines.
4. Integrated ECC corrects single-bit errors silently, safeguarding long-running computations and preventing costly data corruption in financial transaction servers.
5. Registered clock driver stabilizes signal integrity across densely populated server boards, enabling maximum DIMM population without sacrificing reliability.

Why These Specs Matter

The M321R2GA3BB6-CQKET is a server-grade DDR5 RDIMM, and its four defining characteristics directly address the most painful realities of mission-critical data center workloads. In a dense virtualization cluster hosting dozens of VMs, a single uncorrected bit-flip caused by cosmic radiation or heat can silently corrupt guest kernel data, leading to weekend-outage nightmares. The integrated ECC engine systematically detects and corrects such errors in real time, transforming silent data corruption from an existential risk into a non-event, which safeguards transactional integrity without performance penalty. At the same time, the Registered buffer repropagates command and address signals cleanly across high-capacity memory channels. This means you can fully populate 24 DIMMs per socket without signal degradation degrading rank-to-rank latency, keeping a 3TB in-memory database like Redis or SAP HANA stable even under 80% utilization bursts.

Furthermore, the DDR5-4800 speed and Single Rank x8 organization deliver a balanced combination of raw bandwidth and predictable access patterns. For memory analytics that scan billion-row tables, the 38.4 GB/s bandwidth prevents channel starvation, while the single-rank architecture avoids the additional load delays inherent in dual-rank configs, yielding tighter CL40 latency. The 1.1V operating voltage compounds these benefits at scale: across a rack of 1,000 modules, the electrical savings versus 1.2V DDR4 directly reduce power usage effectiveness for colocation budgets and thermal stress on components, extending the service life of your infrastructure without throttling. In essence, this module is purpose-built so that your virtualized services keep running, your in-memory records stay exact, and your operational costs stay controlled—all at the same time.

Endurance & Reliability

This 16GB DDR5-4800 Registered ECC RDIMM (single-rank x8, 288-pin) is server memory, built for data integrity and sustained workloads. Below are capacity planning guidelines for typical enterprise scenarios.

General Virtualization
Populate one DIMM per memory channel to maximize bandwidth for concurrent VMs. In a dual-socket server with eight channels each, installing eight 16GB modules yields 128GB—a balanced density that leaves slots open for future scaling. ECC safeguards virtual machine state against in-memory errors.

In-Memory Database
High-capacity and reliability are critical. Fill all available DIMM slots with identical 16GB RDIMMs, targeting 256GB or more per socket. ECC corrects bit-flips that could corrupt live datasets. Although these modules are single-rank, uniform population ensures predictable latency and full speed, which is vital for real-time query performance.

High-Performance Computing (HPC)
Maximize sustained bandwidth by installing one 16GB DIMM per channel (e.g., eight modules per CPU for 128GB). Keep capacity identical across channels to enable ideal interleaving and reduce memory access latency. The DDR5-4800 speed and registered architecture provide stable, high-throughput data feeding for simulation and modeling tasks.

Verified Compatibility

Validated for servers like Dell PowerEdge R760, HPE ProLiant DL360 Gen11, Lenovo ThinkSystem SR650 V3.

FAQ