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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 128 GB |
| Memory Technology | DDR4 |
| Product Voltage | 1.2 V |
| RAM Speed | 2933 MHz |
| RAM Standard | DDR4-2933/PC4-23400 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL21 |
| Rank | Quad Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
Engineered for enterprise servers and demanding data-center environments, this 128GB DDR4-2933 Registered ECC RDIMM (PC4-23400) delivers quad-rank x4 density to maximize memory capacity in virtualization clusters and in-memory databases. Its 1.2V low-power operation and ECC protection ensure rock‑solid data integrity under sustained heavy loads, while the registered signal type stabilizes command/address lines in fully populated multi‑DIMM configurations.
1. 128GB capacity per module allows a single DIMM to replace multiple smaller sticks, maximizing memory density in 2U rack servers so virtualized workloads and large in-memory databases scale without waiting for additional hardware.
2. ECC error correction actively guards data integrity in always-on enterprise systems, silently correcting single-bit flips that could otherwise crash financial transactions or corrupt critical business records.
3. Registered (buffered) signaling stabilizes command and address buses under full population, enabling data center operators to fill every channel with confidence and maintain signal clarity during peak multi-tenant traffic.
4. Quad Rank x4 architecture delivers high logical ranks from a single slot, boosting overall memory concurrency for hypervisors that juggle dozens of VMs while keeping the physical footprint compact.
5. 2933 MT/s speed supplies the sustained bandwidth modern server processors demand, tightening response times under heavy OLAP analysis and ensuring consistent throughput for clustered middleware.
The M393AAG40M3B-CYFBQ is inherently a server-class RDIMM—a 128GB DDR4-2933 module with ECC and registered signalling—designed to eliminate the vulnerabilities that haunt data center workloads. For your virtualization cluster, the ECC engine is non-negotiable; it actively corrects single-bit errors caused by cosmic radiation before they silently corrupt a virtual machine’s memory state, preventing random guest crashes that erode uptime SLAs. The registered buffer then re-drives the address and command signals, allowing you to fully populate all 24 DIMM slots on a dual‑socket server. With this 128GB quad‑rank module, you reach 3TB of RAM per node without the signal integrity failures that unbuffered memory would suffer, directly translating to 30 percent more VMs per host. In an in‑memory database like SAP HANA, the quad‑rank x4 organization behind CL21 latency leverages bank interleaving to sustain aggressive 2933MT/s throughput, so simultaneous analytical queries and transactional writes experience deterministic, low-latency access rather than channel contention. This combination of error-free integrity, signal‑stabilized high density, and predictable bandwidth means your real‑time financial models and customer‑facing analytics never jeopardize data accuracy, even as memory utilization peaks.
This 128GB DDR4-2933 module uses ECC, Registered signaling, and a quad‑rank x4 organization, clearly identifying it as server memory (RDIMM).
General Virtualization
Populate one 128GB RDIMM per memory channel in a dual‑socket server (8 channels per CPU). Sixteen modules provide 2TB of total capacity, an ideal balance of density and speed. This 1DPC configuration supports high VM consolidation without overstressing the memory bus, keeping latency low for mixed workloads.
In‑Memory Database
Consistent response is critical. Install identical 128GB modules in every channel—again, 16 DIMMs for a dual‑processor platform—to guarantee uniform access times. The 1DPC layout avoids rank‑multiplication penalties, letting the bus run at the full 2933 MT/s for real‑time analytics and ultra‑fast transaction processing.
High‑Performance Computing (HPC)
Bandwidth‑first workloads gain the most from full channel interleaving. Use one 128GB DIMM per channel (16 modules) to maximize throughput at 2933 MT/s. If capacity must scale, a 2DPC configuration is possible, but the quad‑rank load typically forces a downshift to 2666 or 2400 MT/s; stay with 1DPC unless extreme memory footprints are mandatory.
Rigorously tested server DDR4 RDIMM, compatible with Dell PowerEdge R750, HPE ProLiant DL380 Gen10 Plus, Lenovo ThinkSystem SR650 V2.
Q: Can I mix this M393AAG40M3B-CYFBQ with other memory modules of different brands or speeds?
A: Mixing this 128GB DDR4-2933 ECC Registered DIMM with different brands or speeds is strongly discouraged. It may cause signal integrity issues, system instability, or no POST. Always use identical modules for guaranteed compatibility.
Q: Is this memory compatible with my Intel or AMD server platform?
A: This RDIMM is compatible with platforms supporting DDR4-2933 ECC Registered memory, such as Intel Xeon Scalable Gen 2/3 and AMD EPYC 7002/7003 series. Please verify your server’s qualified vendor list for this specific Samsung part.
Q: What is the recommended DIMM population order for optimal performance?
A: For optimal performance, populate memory channels in balanced configurations per your server manual. With Quad Rank x4 DIMMs, typically install in the first slot of each channel first, observing speed reduction limits if multiple ranks per channel.
Q: Does this module support overclocking or XMP profiles?
A: No. This server-grade ECC Registered DIMM strictly adheres to JEDEC DDR4-2933 specifications. It does not support overclocking or XMP profiles, as data integrity and reliability are prioritized over performance tuning.
Q: What warranty and typical failure rate can I expect?
A: This module includes a 1-year warranty. Typical annualized failure rate (AFR) for enterprise-class Samsung RDIMM is well below 0.5% under normal operating conditions, ensuring long-term reliability in 24/7 data center environments.