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Samsung M393A4K40BB3-CVFCQ 32GB DDR4 RDIMM 2933 | Reliable ECC

MPN:M393A4K40BB3-CVFCQ By:Samsung Warranty:1 year
US$532 - $577
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General

Product TypeMemory Module
Memory Capacity32 GB
Memory TechnologyDDR4
RAM Speed2933 MHz
RAM StandardDDR4-2933/PC4-23400
Error IdentifyingECC
Signal TypeRegistered
Column Access Strobe (CAS)CL21
RankDual Rank x4
Quantity of Pins288-pin
RAM GenreRDIMM

Engineer's Note

Ideal for enterprise servers and virtualization platforms requiring high data integrity, this 32GB DDR4-2933 Registered DIMM leverages ECC and a registered signal type to ensure reliable operation under heavy, sustained loads. Its Dual Rank x4 organization enhances memory bandwidth efficiency and interleaving, making it a strong fit for in-memory databases and dense virtual machine environments where stability and uptime are critical.

Technical Specs & Insights

1. Enabling up to 32GB per module, this density allows a single server to host significantly more virtual machines, directly reducing data center footprint and cost per workload.
2. Operating at 2933 MT/s, the memory bandwidth accelerates in-memory databases and real-time analytics, cutting query response times under heavy concurrent user loads.
3. ECC protection silently corrects single-bit errors in real time, guarding critical financial transactions or medical records against silent data corruption that could otherwise crash the system.
4. The registered signal design buffers address and command lines, ensuring rock-solid stability across fully populated 24-DIMM server boards where unbuffered modules would suffer signal degradation.
5. Dual Rank x4 organization interleaves memory accesses across two internal rank groups, sustaining peak channel utilization and predictable throughput for latency-sensitive enterprise workloads.

Why These Specs Matter

In a data center running dense virtualization clusters, the Samsung M393A4K40BB3-CVFCQ 32GB DDR4-2933 RDIMM directly addresses the realities that keep IT managers awake at night. Its ECC protection continuously detects and corrects single-bit memory errors caused by background radiation—without this, a flipped bit inside a hypervisor’s memory space silently corrupts multiple guest machines, making root-cause analysis a nightmare and risking transaction integrity. The Registered architecture buffers command and address signals, allowing dozens of these modules to populate a single server without destabilizing the memory controller; for an in-memory database like Redis or SAP HANA, that translates to scaling to terabytes of reliable capacity where every microsecond of response time matters. Meanwhile, the dual-rank x4 organization interleaves internal banks to deliver significantly higher sustained bandwidth under concurrent workloads. When dozens of virtualized instances hammer the memory bus simultaneously, that interlacing keeps throughput high and latency spikes low, so critical financial analytics or real-time patient monitoring systems never stutter. Paired with a balanced 2933 MT/s speed and CL21 latency, this module ensures that your infrastructure serves data as predictably and safely tomorrow as it does today—no surprises, just unwavering uptime.

Endurance & Reliability

General Virtualization
32 GB Registered ECC DDR4-2933 modules are ideal for dense server virtualization. Populate memory channels evenly across both sockets — a common starting point is four to eight modules per host to provide 128–256 GB for moderate VM densities. Balance DIMMs across channels and use identical ranks to maintain NUMA locality and reliable performance.

In-Memory Database
For in-memory databases demanding large, low-latency footprints, fully populate all memory channels with these dual-rank x4 RDIMMs. A typical 2-socket server can host 12–24 modules, delivering 384–768 GB of ECC-protected capacity. Keeping all channels populated with identical 32 GB DIMMs ensures optimal interleaving and minimal access latency.

High-Performance Computing
HPC workloads benefit from the high bandwidth of eight-channel memory architectures. Install six or twelve 32 GB modules per CPU — one or two DIMMs per channel — to maximize throughput. Dual-rank x4 configuration provides a good balance of capacity and sustained speed, and registered ECC guarantees data integrity under extended heavy computation runs.

Verified Compatibility

Rigorously tested for compatibility with servers like Dell PowerEdge R750, HPE ProLiant DL380 Gen10+, Lenovo ThinkSystem SR650.

FAQ

Q: Can I mix this M393A4K40BB3-CVFCQ with other memory modules of different brands or speeds?

A: Mixing modules with different brands, speeds, or ranks is not recommended for RDIMM servers. It can cause instability and prevent proper ECC functionality; always use identical modules for reliable operation.

Q: Is this memory compatible with my system?

A: This DDR4-2933 Registered ECC RDIMM fits server platforms such as Intel Xeon Scalable (C620 chipset) and AMD EPYC 7002/7003 series. Verify your motherboard QVL for guaranteed compatibility.

Q: What is the recommended DIMM population order for optimal performance?

A: Populate according to your server board manual: typically fill the farthest slot from the CPU in each channel first, install balanced pairs, and maintain equal ranks per channel for optimal bandwidth.

Q: Does this module support overclocking or XMP profiles?

A: No, this is a JEDEC-standard RDIMM. It runs natively at DDR4-2933 and does not support XMP or overclocking, ensuring enterprise-class stability and data integrity.

Q: What warranty and typical failure rate can I expect?

A: This module includes a 1-year warranty. Enterprise RDIMMs exhibit very low failure rates (typical AFR below 0.5%), making them suitable for demanding 24/7 server environments.

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