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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 32 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 | Dual Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
This Samsung M393A4K40DB2-CTD7Y is a 32GB DDR4-2666 Registered ECC DIMM engineered for server platforms, where its dual-rank x4 organization and ECC ensure robust data integrity and improved memory interleaving under heavy virtualization and in-memory database workloads. The registered signal type stabilizes high-capacity configurations by reducing electrical load on the memory controller, while the CL19 latency provides a balanced response for enterprise-class reliability.
1. A generous 32GB per module density lets you pack more memory into each server node, maximizing the number of virtual machines that can run concurrently without swapping to storage.
2. ECC protection silently detects and corrects single-bit errors, preserving data integrity for mission-critical databases and financial workloads that cannot tolerate silent corruption.
3. Registered signal re-driving preserves clean command and address paths across heavily populated memory channels, keeping large-scale servers stable even with all DIMM slots filled.
4. Dual Rank x4 organization interleaves multiple internal banks to keep the memory channel fully utilized, sustaining high throughput for analytics and multi-tenant cloud instances.
5. The DDR4-2666 speed tier delivers substantial bandwidth per channel, ensuring responsive application performance in enterprise environments where hundreds of users access the system simultaneously.
When your virtualization cluster hosts dozens of mission-critical VMs on a single node, memory integrity isn’t a luxury—it’s the difference between seamless uptime and corrupted transactions. The M393A4K40DB2-CTD7Y is engineered precisely for this reality. Its ECC technology silently detects and corrects single-bit errors, neutralizing the invisible threat of cosmic-ray-induced bit flips that could silently poison financial records or customer data. Meanwhile, the Registered signal buffering stabilizes the electrical load, allowing you to populate dense 32GB DIMMs across all channels without signal degradation—so your hypervisor can confidently assign every last gigabyte to demanding memory databases like SAP HANA or Redis. Dual Rank x4 organization further elevates performance by interleaving memory accesses, delivering higher sustained bandwidth when in-memory analytics scan billions of rows in real time. And with 1.2V low-voltage operation, even a fully loaded server rack sees tangible power savings and reduced thermal stress, translating directly into lower cooling overhead and a longer operational lifespan for your entire infrastructure. This module doesn’t just store data; it safeguards the consistency, speed, and economics of your enterprise workloads.
General Virtualization
For general virtualization, populate all memory channels of a dual-socket server with a single 32GB Registered ECC DDR4-2666 RDIMM per channel. This yields 384 GB (12 DIMMs × 32 GB), maintains the full 2666 MT/s speed, and keeps one DIMM per channel (1DPC) for optimal bandwidth and latency. The dual-rank x4 organization improves bank interleaving, and the uniform configuration simplifies NUMA-aware resource allocation across virtual machines.
In-Memory Database
In-memory database workloads prioritize capacity over peak frequency. Install two identical 32 GB RDIMMs per channel to reach 768 GB in a server with twelve memory channels, accepting a possible speed reduction to 2400 MT/s. This larger footprint allows entire datasets to reside in RAM, while ECC and the registered interface ensure data integrity and signal stability. Enable rank interleaving in the BIOS to sustain throughput despite the higher load.
High Performance Computing
HPC applications demand maximum memory bandwidth and low latency, so populate one 32 GB dual-rank x4 RDIMM per channel (1DPC) to run at the rated DDR4-2666 speed. A 12-DIMM configuration in a dual-socket node provides 384 GB of balanced, high-throughput memory. The dual-rank design further enhances bank-level parallelism, reducing access conflicts during tightly coupled parallel operations.
Rigorously tested for servers, compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650, and more.
Q: Can I mix this M393A4K40DB2-CTD7Y with other memory modules of different brands or speeds?
A: Mixing this Samsung 32GB DDR4-2666 ECC Registered DIMM with different brands or speeds risks incompatibility and instability. We strongly advise installing identical modules with the same Samsung MPN to ensure validated server reliability.
Q: Is this memory compatible with my system?
A: This DDR4-2666 ECC Registered module is compatible with Intel Xeon Scalable (Purley) and AMD EPYC platforms that support RDIMMs. Confirm your server board’s QVL lists this Samsung M393A4K40DB2-CTD7Y before purchasing.
Q: What is the recommended DIMM population order for optimal performance?
A: For optimal performance, populate identical DIMMs per channel starting with the farthest slot from the CPU. Adhere to your server’s population guide, balancing DIMMs evenly across memory channels to achieve maximum bandwidth and interleaving.
Q: Does this module support overclocking or XMP profiles?
A: No. This Samsung ECC Registered DIMM follows JEDEC-standard DDR4-2666 at 1.2V. It does not support overclocking or XMP profiles, as mission-critical server stability is prioritized over performance tuning.
Q: What warranty and typical failure rate can I expect?
A: This module includes a 1-year warranty. Samsung enterprise memory typically delivers an annualized failure rate (AFR) below 0.5% under specified conditions, providing the high reliability required for demanding data center operations.