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| Product Type | Memory Module |
|---|---|
| Compliance Standards | |
| Memory Capacity | 32 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 |
Designed for server platforms, this 32GB DDR4-3200 Registered ECC RDIMM (M393A4K40EB3-CWECQ) ensures data integrity in virtualized environments and memory-intensive databases. Its dual-rank x4 organization with CL22 latency maximizes memory bandwidth and stability, while the registered signal type reduces electrical loading for reliable operation in high-density deployments.
1. ECC protection continuously corrects single-bit memory faults, ensuring data integrity for financial ledgers, virtualized databases, and 24/7 enterprise workloads.
2. Registered buffer architecture isolates the memory controller from electrical loading, allowing fully populated channels to run reliably in dense rack server deployments.
3. Dual rank x4 organization enables rank interleaving that saturates channel bandwidth, delivering consistent performance during heavy multi-VM consolidation and real-time analytics.
4. High per-module capacity maximizes total system memory footprint, supporting expansive virtual desktop pools and large in-memory caches without exhausting DIMM slots.
5. The ram speed class provides sufficient throughput to feed multi-core server processors efficiently, reducing data retrieval stalls in latency-sensitive cloud applications.
The Samsung M393A4K40EB3-CWECQ is a server-grade DDR4 RDIMM built for uptime-critical workloads. Its four key attributes directly solve real-world challenges. First, ECC corrects single-bit errors on the fly, eliminating silent data corruption. For a virtualization host running multiple VMs, this means no random crashes from flipped bits in the hypervisor or guest memory. Second, the registered design buffers control signals, enabling you to fully populate memory channels with multiple 32GB modules. In a dense VMware cluster or an in-memory database like SAP HANA, that stability allows you to scale to terabytes of RAM without signal integrity issues. Third, the dual-rank x4 configuration interleaves accesses across internal banks, boosting effective bandwidth and lowering latency. For a Redis instance processing millions of ops/sec, that translates to noticeably faster transactions. Finally, 3200MT/s speed with CL22 latency and 1.2V operation delivers high throughput with remarkable power efficiency, reducing both cooling and electricity costs.
General Virtualization
For a 32GB RDIMM, populate multiple identical modules across all memory channels to maximize bandwidth and maintain balanced NUMA domains. In a dual-socket server, deploying eight or more of these 32GB sticks enables 256GB–512GB total capacity, comfortably hosting dozens of moderate VMs while leaving headroom for vMotion and failover. Always install in matched pairs or sets per CPU to preserve memory interleaving and predictable latency under mixed-workload contention.
In-Memory Database
With Registered ECC and dual-rank x4 organization, this module delivers the data integrity and sustained throughput required by in-memory datasets. Combine multiple 32GB DIMMs to reach 512GB–1TB per node, ensuring the entire database working set fits in DRAM without swapping. Populate all memory channels equally—typically one DIMM per channel—to achieve peak memory bandwidth, which is critical for Redis, Memcached, or SAP HANA transactional performance.
High-Performance Computing
HPC workloads benefit from the module’s DDR4-3200 speed and registered design that stabilizes multi-DIMM configurations. Use a balanced memory population profile, such as one 32GB RDIMM per memory channel on all available channels, to deliver high aggregate bandwidth for MPI-based simulations. For capacity-bound HPC, scale out with 16–24 modules per compute node while maintaining the same channel-level balance, avoiding overloading any channel and causing frequency downgrades that hurt floating-point throughput.
Thoroughly tested server RDIMM, works with Dell PowerEdge R760, HPE ProLiant DL380 Gen11, Lenovo ThinkSystem SR650 V3, and more.
Q: Can I mix this M393A4K40EB3-CWECQ with other memory modules of different brands or speeds?
A: Mixing Registered ECC DIMMs is strongly discouraged. Different brands, speeds, or ranks can cause instability, boot failures, or silent data corruption. Always populate identical modules to maintain signal integrity and platform reliability.
Q: Is this memory compatible with my Intel Xeon or AMD EPYC server platform?
A: This DDR4-3200 RDIMM is designed for servers supporting Registered ECC memory. Verify your motherboard's Qualified Vendor List (QVL) for M393A4K40EB3-CWECQ and ensure the CPU supports 3200MT/s at 1.2V with dual-rank x4 DIMMs.
Q: What is the recommended DIMM population order for optimal performance?
A: Follow your server manual’s population guidelines for balanced memory configurations. Typically, install identical DIMMs in identical slots per channel, starting with the farthest slot from the CPU. For this dual-rank RDIMM, populate symmetrically across memory channels.
Q: Does this module support overclocking or XMP profiles?
A: No, this is an enterprise-grade Registered ECC module operating strictly at JEDEC standard DDR4-3200 CL22. It does not support XMP, overclocking, or voltage adjustments, as reliability and data integrity are paramount in server environments.
Q: What warranty and typical failure rate can I expect?
A: This memory includes a one-year warranty. As a server-class Samsung RDIMM built with rigorous binning and ECC technology, its annualized failure rate (AFR) is extremely low, ensuring high uptime in 24/7 mission-critical deployments.