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Samsung M386A8K40BMB-CRC 64GB DDR4 RDIMM 2400MT/s | Massive Capacity

MPN:M386A8K40BMB-CRC By:Samsung Warranty:1 year
US$424 - $459
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General

Compliance StandardsEU RoHS,FCC
Product TypeMemory Module
Memory Capacity64 GB
Memory TechnologyDDR4
Product Voltage1.2 V
RAM Speed2400 MHz
RAM StandardDDR4-2400/PC4-19200
Error IdentifyingECC
Signal TypeRegistered
Column Access Strobe (CAS)CL17
RankQuad Rank x4
Quantity of Pins288-pin
RAM GenreRDIMM

Engineer's Note

This RDIMM module delivers 64GB of DDR4-2400 capacity with ECC and registered signal technology, ensuring data integrity and stable operation under heavy multi-rank loads in virtualized servers and in-memory databases. Its quad-rank x4 organization maximizes density per channel, making it an ideal choice for large-scale memory-centric workloads requiring reliable, high-capacity expansion.

Technical Specs & Insights

1. Built-in ECC actively corrects single-bit memory errors, ensuring the absolute data fidelity that enterprise virtualization and database servers demand around the clock.

2. Register logic isolates the command bus from heavy DRAM loads, enabling fully populated server boards to run stably without compromising access latency.

3. Quad rank organization interleaves multiple rank groups, maximizing channel bandwidth utilization for high-concurrency workloads like large-scale web serving and real-time analytics.

4. A high-capacity module footprint supports extensive virtual machine density, letting IT consolidate more workloads per physical host and reduce total hardware footprint.

5. A conservative speed bin aligned with JEDEC standards guarantees wide compatibility and steady energy efficiency, ideal for dense rack deployments where thermal consistency is paramount.

Why These Specs Matter

In modern data centers, where uptime and data integrity are non-negotiable, this 64GB DDR4-2400 Registered DIMM is engineered to eliminate the silent threats that undermine server reliability. For a virtualization cluster hosting dozens of VMs, the ECC technology actively corrects single-bit memory errors caused by cosmic radiation or electrical noise—bit flips that could otherwise corrupt hypervisor state or silently alter in-flight financial transactions. That translates directly into prevented crashes and consistent audit trails. Meanwhile, the Registered signal buffer offloads the electrical load from the CPU’s memory controller, allowing you to fully populate all channels with large-capacity modules like this one without sacrificing signal integrity or clock speed. This stability is essential when running in-memory databases such as Redis or SAP HANA, where the module’s Quad Rank x4 organization pumps sustained bandwidth under heavy concurrent access, and the 1.2V DDR4 efficiency helps keep thermal and power budgets in check across densely packed rack servers.

Endurance & Reliability

General Virtualization
Deploy 64GB Registered ECC DDR4 modules to achieve high memory density per host, comfortably supporting dozens of virtual machines. For dual-socket servers, install at least four DIMMs per CPU (one per channel) to enable balanced memory bandwidth and avoid NUMA bottlenecks. This configuration scales efficiently from 256GB to multi-terabyte footprints as VM demands grow.

In-Memory Database
Large-capacity RDIMMs with error correction are essential for in-memory datasets where data integrity is critical. Populate all memory channels symmetrically—typically one 64GB DIMM per channel—to maximize throughput and keep latency low under heavy transactional loads. This approach lets you pack 512GB or more per socket while sustaining real-time analytical performance.

High-Performance Computing
Quad-rank x4 2400MT/s RDIMMs deliver the reliability and density required for large-scale simulations and modeling. Install one DIMM per channel (1DPC) to maintain the fastest supported speed, then add identical modules across all channels to preserve uniform memory access. For memory-bandwidth-bound workloads, complement this setup by aligning process pinning with the NUMA topology, minimizing remote access penalties.

Verified Compatibility

Rigorously tested, server-ready. Compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650.

FAQ

Q: Can I mix this M386A8K40BMB-CRC with other memory modules of different brands or speeds?

A: Mixing with dissimilar modules is not recommended for server environments. Even minor variances in rank, timing, or IC can compromise signal integrity and system stability. Use identical part numbers for guaranteed reliability.

Q: Is this memory compatible with my server platform (Intel Xeon or AMD EPYC)?

A: Yes, this DDR4-2400 RDIMM is compatible with any server board supporting Registered ECC memory, such as Intel Xeon E5-2600 v3/v4 or select AMD EPYC platforms. Verify your board’s Qualified Vendor List.

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

A: Populate identical DIMMs evenly across memory channels as per your server’s manual. For this quad-rank module, start with one DIMM per channel to maintain balanced loading and maximize bandwidth.

Q: Does this module support overclocking or XMP profiles?

A: No. Enterprise RDIMMs adhere strictly to JEDEC specifications (DDR4-2400, CL17) for deterministic reliability and data integrity. Overclocking, XMP, and voltage adjustment are not supported.

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

A: This module carries a 1-year warranty. Its ECC and rigorous component screening yield an extremely low annualized failure rate (AFR), meeting enterprise demands for 24/7 operation over a long service life.

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