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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 64 GB |
| Memory Technology | DDR4 |
| Product Voltage | 1.2 V |
| RAM Speed | 3200 MHz |
| RAM Standard | DDR4-3200/PC4-25600 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL22 |
| Rank | Dual Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
DDR4-3200 RDIMM with ECC and registered signaling, this 64 GB module is engineered for enterprise server platforms running virtualization, in-memory databases, and mission-critical workloads where data integrity is non-negotiable. Its dual-rank x4 organization optimizes bandwidth and bank-level parallelism under heavy load, while the 1.2 V operating voltage and CL22 latency deliver reliable, power-efficient memory scalability in dense rack deployments.
1. 64GB capacity enables high-density virtualization, allowing a single server to host significantly more VMs without exhausting memory resources.
2. ECC protection silently corrects single-bit errors, safeguarding transactional data integrity in financial or database workloads where corruption is unacceptable.
3. Registered signal type stabilizes command and address signals across fully loaded server boards, making large-scale memory configurations viable without risking signal degradation.
4. Dual Rank x4 organization interleaves accesses across ranks to fully utilize each memory channel, delivering predictable throughput for latency-sensitive enterprise applications under continuous load.
5. 3200 MT/s speed elevates memory bandwidth to match multi-core server CPUs, preventing data starvation during concurrent analytics or high-frequency trading computations.
The Samsung M393A8G40AB2-CWEBY is a 64GB DDR4-3200 ECC Registered DIMM engineered for mission-critical servers. In virtualized environments, ECC is your first line of defense: it transparently corrects single-bit errors before they silently corrupt hypervisor memory states—an unchecked flip can crash every VM on the host. Registered buffering then ensures you can fully populate memory channels without the signal degradation that plagues unregistered DIMMs, letting you scale to 512GB or more for dense server consolidation without compromising stability. The dual-rank x4 organization further amplifies performance through rank interleaving, allowing overlapping command execution; for an in-memory database like SAP HANA or a high-traffic Redis cluster, this directly lowers query latency and sustains responsiveness under simultaneous requests. Meanwhile, the 3200MT/s transfer rate keeps the CPU data pipe saturated, eliminating memory bottlenecks during peak loads. All at 1.2V, keeping power envelopes in check.
The specified module is a 64GB DDR4-3200 Registered ECC RDIMM (M393A8G40AB2-CWEBY), designed exclusively for servers. Below are capacity planning guidelines for typical server workloads.
General Virtualization
For virtualized environments, deploy eight identical 64GB modules (512GB) per dual-socket server, populating one DIMM per channel to deliver balanced bandwidth. Dual-rank x4 RDIMMs ensure high capacity without sacrificing memory speed. If additional memory is needed, add a second module per channel, accepting a slight frequency downgrade on most platforms.
In-Memory Database
Maximize capacity by fully populating all DIMM slots with 64GB RDIMMs, scaling to multi-terabyte footprints. Use identical modules across all memory controllers to prevent imbalance. Registered ECC is critical for data integrity; configure two modules per channel when necessary, noting that speed may drop to 2933MT/s depending on the platform.
High-Performance Computing (HPC)
Prioritize bandwidth by installing one 64GB module per channel (1DPC) to sustain full 3200MT/s speed. A dual-socket node with 16 modules delivers 1TB of balanced high-speed memory. The dual-rank x4 organization provides strong throughput; expand with a second module per channel if capacity is paramount, understanding that it may reduce frequency.
Rigorously tested, compatible with servers: Dell PowerEdge R750, HPE DL380 Gen10 Plus, Lenovo SR650 V2.
Q: Can I mix this M393A8G40AB2-CWEBY with other memory modules of different brands or speeds?
A: Mixing RDIMMs of different brands or speeds is strongly discouraged. Inconsistent ranks, timings, or vendors can cause instability, POST failures, and unpredictable server behavior. Always populate with identical part numbers for validated reliability.
Q: Is this memory compatible with my system?
A: This 64GB DDR4-3200 ECC Registered DIMM is compatible with servers supporting 288-pin RDIMMs, such as Intel Xeon Scalable (2nd Gen+) and AMD EPYC 7002/7003 platforms. Validate against your server vendor’s memory QVL for guaranteed compatibility.
Q: What is the recommended DIMM population order for optimal performance?
A: For dual-socket servers, install identical DIMMs symmetrically across both CPUs. Follow your board’s guide: typically populate the first DIMM slot in each channel (often blue slots) to achieve balanced interleaved configuration and maximum throughput.
Q: Does this module support overclocking or XMP profiles?
A: No. This JEDEC-compliant RDIMM operates at standard DDR4-3200 CL22 with no XMP or overclocking support. It is designed for 24/7 server stability, not enthusiast tuning.
Q: What warranty and typical failure rate can I expect?
A: This Samsung RDIMM is backed by a 1-year warranty. Enterprise-grade DDR4 ECC memory exhibits very low annualized failure rates, typically under 0.5%, ensuring dependable operation in critical infrastructure.