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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 256 GB |
| Memory Technology | DDR4 |
| Product Voltage | 1.2V |
| RAM Speed | 2933MHz |
| RAM Standard | DDR4-2933/PC4-23400 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL21 |
| Rank | Octal Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
This 256GB DDR4-2933 Registered ECC RDIMM is engineered for enterprise servers and memory-intensive workloads like virtualization and in-memory databases, where data integrity is critical. Its octal-rank x4 configuration maximizes bank-level parallelism for higher sustained bandwidth, while registered signaling and ECC ensure robust signal integrity and error correction in dense, multi-DIMM deployments.
1. An exceptionally high module density empowers single-slot expansion to terabyte-class footprints, directly boosting virtual machine consolidation ratios in cloud and enterprise data centers.
2. ECC protection silently detects and corrects single-bit errors, preserving data integrity for financial ledgers and in-memory databases that cannot tolerate even silent corruption.
3. Registered buffer architecture decouples the memory controller from heavy electrical loads, letting fully populated server channels run reliably at scale without signal degradation or crashes.
4. A high-rank x4 interleave layout parallelizes bank-level access across numerous independent ranks, sustaining steady bandwidth saturation during massive concurrent query streams.
5. Fast clocking translates into elevated peak bandwidth per channel, shrinking job completion windows for memory-hungry HPC simulations and accelerating real-time business analytics.
The M386ABG40M50-CYFB0 is a 256GB DDR4-2933 Registered ECC DIMM purpose-built for enterprise servers, where memory integrity and density directly dictate uptime and performance. In virtualized clusters hosting dozens of workloads per node, a single undetected bit flip can corrupt hypervisor memory and crash multiple tenants simultaneously. The module’s ECC engine silently detects and corrects these errors in real time, transforming a potential business disruption into a non-event. Its registered architecture buffers command and address signals, preserving clean electrical signaling across fully populated channels, so you can install terabytes of RAM without compromising stability—crucial when scaling memory for in-memory databases like SAP HANA that demand sub-microsecond access to massive hot datasets. The octal-rank x4 organization multiplies internal bank groups, sustaining high concurrency during mixed analytical queries and online transaction processing under heavy load. At 2933 MHz, it delivers the consistent bandwidth required to prevent throttled throughput when every millisecond drives real-time financial decisions. What this means for IT infrastructure is straightforward: higher virtual machine density, faultless data integrity, and a lower total cost of ownership by eliminating the silent data degradation that unbuffered, non-ECC alternatives simply cannot address.
General Virtualization
Leverage 256 GB RDIMMs in balanced multiples across memory channels to maximize bandwidth. For a dual-socket server, installing two modules per CPU (512 GB total) suits moderate VM density, while four modules per CPU (1 TB) supports heavier consolidation. Always populate identical modules per channel to maintain uniform latency and avoid NUMA penalties.
In-Memory Database
Capacity is paramount, so fill all available DIMM slots with these high-density octal-rank modules to reach multi-terabyte footprints. Configure one module per channel initially to sustain peak frequency, then add a second module per channel only if the dataset demands it, accepting a slight speed trade-off. Enable DRAM sparing and patrol scrubbing to safeguard data integrity under constant access.
High-Performance Computing (HPC)
Prioritize memory bandwidth by installing at least one DIMM per memory channel—eight modules on an eight-channel platform yield 2 TB and peak throughput. Use symmetric population in all channels to avoid throttling, and keep CAS latency (CL21) identical across modules. For bandwidth-bound workloads, prefer a single module per channel; if capacity needs exceed 2 TB, add a matching second module per channel while monitoring for clock-speed reduction.
This rigorously tested server memory is compatible with Dell PowerEdge R740/R750, HPE ProLiant DL380 Gen10, and Lenovo ThinkSystem SR650 V2.
Q: Can I mix this M386ABG40M50-CYFB0 with other memory modules of different brands or speeds?
A: Mixing modules is not recommended in server environments. This 256GB Octal Rank x4 RDIMM uses a specific design. To ensure signal integrity and avoid stability issues, use identical M386ABG40M50-CYFB0 modules only.
Q: Is this memory compatible with my system?
A: This DDR4-2933 RDIMM is compatible with Intel Xeon Scalable and AMD EPYC platforms supporting registered ECC memory. Please consult your server’s Qualified Vendor List (QVL) to confirm 256GB Octal Rank support.
Q: What is the recommended DIMM population order for optimal performance?
A: Populate identical DIMMs per channel, first filling white slots matching your server’s manual. For Octal Rank modules, typical limit is one DIMM per channel to maintain 2933MHz; consult platform-specific balancing rules.
Q: Does this module support overclocking or XMP profiles?
A: No. This is an enterprise JEDEC-compliant DDR4-2933 RDIMM. It does not support XMP profiles or overclocking; it operates strictly at standard JEDEC timings to guarantee platform stability and reliability.
Q: What warranty and typical failure rate can I expect?
A: This module includes a 1-year warranty. It is enterprise-grade with an extremely low annualized failure rate (typically below 0.5%), delivered through rigorous testing and stringent component screening for 24/7 operation.