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| Product Type | Memory Module |
|---|---|
| Compliance Standards | |
| Memory Capacity | 16 GB |
| Memory Technology | DDR4 |
| Product Voltage | 1.2 V |
| RAM Speed | 2666 MHz |
| RAM Standard | DDR4-2666/PC4-21300 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL19 |
| Rank | Single Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
This 16GB DDR4-2666 Registered ECC RDIMM (PC4-21300, Single Rank x4) ensures superior data integrity and server-class stability, making it ideal for virtualization hosts and in-memory databases where error correction is critical. Its single-rank x4 organization with CL19 access latency optimizes memory controller loading and reduces I/O power consumption, delivering reliable high-density memory expansion for enterprise servers.
1. 16GB capacity provides the headroom necessary to consolidate multiple virtual machines on a single node, directly increasing workload density without resorting to costly hardware expansion.
2. ECC protection continuously corrects single-bit memory errors, preventing silent data corruption in financial transactions and databases that demand unbreakable integrity.
3. Registered signal buffering stabilizes the command and address lines across fully loaded server channels, preserving reliability as memory populations scale up in multi-slot platforms.
4. RDIMM architecture ensures compatibility with dual-socket and enterprise-grade motherboards, delivering the predictable boot and operational behavior required for always-on data center services.
5. DDR4-2666 data rate supplies the sustained bandwidth needed to saturate modern multi-core Xeon processors, keeping large in-memory datasets moving without stalling analytical queries.
The Samsung M393A2K40CB2-CTD is a 16GB DDR4-2666 Registered DIMM engineered for server platforms, where its enterprise-grade attributes directly counter critical infrastructure pain points. In a dense virtualization cluster, the ECC capability silently corrects single-bit errors induced by cosmic radiation or electrical noise, preventing silent data corruption that could cascade into multiple VM failures and unbudgeted downtime. Its registered signal buffer actively stabilizes command and address lines, allowing you to fully populate all memory channels without signal degradation—this is the only way to reliably scale a hypervisor host to the multi-terabyte capacities modern workloads demand. For in-memory databases like SAP HANA or real-time Redis caching, the bus operates at a low 1.2V to curb thermal output in 24/7 data centers, while the single-rank x4 organization at 2666 MT/s delivers predictable low latency under heavy parallel access. This combination means your analytics queries complete consistently without jitter, and every financial transaction or patient record is protected from undetected memory faults, directly safeguarding your operational integrity and compliance posture.
Server Memory Capacity Planning
This DDR4-2666 16GB Registered ECC RDIMM is designed for server-class systems requiring data integrity and stability. Its ECC and registered features enable reliable operation under sustained workloads, making it suitable for various enterprise scenarios.
General Virtualization
For a virtualization host, populate at least six modules (96GB total) across balanced memory channels to support dozens of lightweight VMs. Configure modules in identical sets per CPU socket to maintain NUMA symmetry and ensure consistent performance under memory overcommitment.
In-Memory Database
In-memory databases demand high capacity and fault tolerance. Deploy fully populated configurations with identical 16GB DIMMs—aim for 256GB or more across all channels—to store large datasets entirely in RAM. ECC is critical here to prevent silent data corruption during transactional processing.
High Performance Computing
HPC applications benefit from maximum memory bandwidth. Install one DIMM per channel (e.g., eight modules for a dual-socket, four-channel platform) to avoid rank contention and achieve optimal throughput. Select 16GB modules to balance capacity and density, ensuring each node has enough headroom for large simulation datasets.
Rigorously tested for compatibility with Dell PowerEdge R760, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650, and similar servers.
Q: Can I mix this M393A2K40CB2-CTD with other memory modules of different brands or speeds?
A: Mixing is not advised for ECC Registered memory. Mismatched RDIMMs can cause stability issues or prevent booting. For server reliability, install identical M393A2K40CB2-CTD modules in each channel.
Q: Is this memory compatible with my system? Does it support Intel Xeon or AMD EPYC platforms?
A: This 16GB DDR4-2666 ECC RDIMM is compatible with servers using Intel Xeon Scalable (Skylake/Cascade Lake) or AMD EPYC 7002 series processors that support 288-pin Registered DDR4 at 1.2V.
Q: What is the recommended DIMM population order for optimal performance?
A: Follow your server motherboard's population guide. Generally, populate identical DIMMs starting from the farthest slot per channel, balancing across all memory channels to maximize interleaving and bandwidth.
Q: Does this module support overclocking or XMP profiles?
A: No. This Samsung RDIMM operates strictly at JEDEC-standard DDR4-2666 CL19 with no XMP. Server memory prioritizes error-free stability over overclocking, so such features are not supported.
Q: What warranty and typical failure rate can I expect?
A: The module includes a 1-year warranty. As enterprise-grade Samsung RDIMM, it exhibits a very low annualized failure rate (typically under 0.1%), ensuring reliable 24/7 operation in compliant server environments.