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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 16 GB |
| Memory Technology | DDR4 |
| Product Voltage | 1.2V |
| RAM Standard | DDR4-2400/PC4-19200 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL17 |
| Rank | Dual Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
This 16GB DDR4-2400 Registered ECC RDIMM is engineered for server platforms handling memory-intensive workloads like virtualization, in-memory databases, and enterprise data integrity tasks. The Dual Rank x4 configuration paired with registered signal buffering ensures stable operation at high capacities, while ECC protection delivers critical single-bit error correction to safeguard data in always-on environments.
1. A 16GB capacity per module provides the density foundation for dense server farms, enabling higher virtual machine counts per physical host without resorting to costly, oversized DIMMs.
2. Integrated ECC corrects single-bit memory errors in real time, preserving the integrity of financial transactions and long-running analytics workloads where even one corrupt bit can cascade into systemic failures.
3. The registered buffer isolates the memory controller from excessive electrical loading, allowing fully populated multi-DIMM channels to maintain rock-solid signal stability across 24/7 rack environments.
4. Dual Rank x4 organization leverages interleaving across internal ranks to sustain higher sustained bandwidth under heavy multi-tenant workloads, reducing memory access collisions during peak consolidation hours.
5. DDR4-2400 transfers data at PC4-19200 throughput, delivering the sweet spot of energy-efficient bandwidth that keeps thermal budgets in line within passively cooled dense server chassis.
The Samsung M393A2G40EB1-CRC4Q is an RDIMM engineered for the relentless demands of modern servers, where memory integrity and stability directly impact the bottom line. Its four defining characteristics translate into real-world reliability for mission-critical workloads. The ECC technology silently corrects single-bit errors caused by cosmic radiation or electrical noise—for a financial database or in-memory transaction system, this means the difference between a balanced ledger and silent data corruption that could cascade into catastrophic financial loss. Registered buffering is not just a technical footnote; it decouples the memory control lines from the CPU, allowing a virtualization cluster to densely populate all DIMM slots without signal degradation. This ensures that dozens of virtual machines running on a single host remain responsive under load. The dual-rank x4 organization and CL17 latency at 1.2V optimize bandwidth and power efficiency, which is critical when an in-memory caching layer like Redis must sustain millions of low-latency operations per second. With this module, you are not buying components—you are investing in nonstop data accuracy and high-density stability that keep your services online and your users confident.
This 16GB DDR4-2400 RDIMM (ECC, Registered, dual-rank x4) is server-grade memory. Capacity planning advice follows.
General Virtualization
Populate one DIMM per channel (1DPC) to maintain the rated 2400MT/s. A dual-socket server with eight memory channels per CPU can host 16 modules for 256GB, sufficient for diverse VM mixes. For higher-density needs, add a second dual-rank DIMM per channel, though the speed will step down to 1866MT/s.
In-Memory Database
Fill all DIMM slots with these 16GB modules to maximize capacity; a 24-slot system yields 384GB. Balance modules identically across all memory controllers for symmetric interleaving and minimal latency. The dual-rank design enhances bank-level parallelism, critical for transaction-heavy databases.
High-Performance Computing
Use 1DPC to achieve peak bandwidth at 2400MT/s. A 16-module, 256GB configuration across all channels delivers the throughput needed for simulation and modeling. Move to 2DPC only if capacity requirements force it, accepting a downclock and possible performance loss. The dual-rank x4 organization further improves interleaving, boosting effective bandwidth for HPC codes.
Server memory rigorously tested: compatible with Dell PowerEdge R750, HPE ProLiant DL380 Gen10 Plus, Lenovo ThinkSystem SR650 V2.
Q: Can I mix this M393A2G40EB1-CRC4Q with other memory modules of different brands or speeds?
A: Mixing with other brands or speeds is not recommended for this RDIMM. Mixed modules may cause signal integrity issues, forcing the system to downclock to the slowest DIMM and potentially disabling ECC or causing instability.
Q: Is this memory compatible with my server system?
A: This Samsung RDIMM is compatible with Intel and AMD server platforms supporting DDR4-2400 Registered ECC memory. Verify your motherboard's Qualified Vendor List and ensure the CPU memory controller supports 16GB Dual Rank x4 RDIMMs.
Q: What is the recommended DIMM population order for optimal performance?
A: Follow the slot numbering in your server manual, typically populating matching blue or white slots first per channel. Install identical DIMMs in balanced configurations to maximize interleaving and memory bandwidth across all installed processors.
Q: Does this module support overclocking or XMP profiles?
A: No. As an enterprise-grade Registered ECC DIMM, this module adheres to JEDEC DDR4-2400 standards and does not support XMP or overclocking. It is designed for data integrity and 24/7 stability, not enthusiast tuning.
Q: What warranty and typical failure rate can I expect for this module?
A: This module includes a 1-year warranty. Enterprise RDIMMs have an Annualized Failure Rate typically below 0.5% under proper cooling. We recommend monitoring ECC logs to proactively identify any correctable errors within the warranty period.