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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 64 GB |
| Memory Technology | DDR4 |
| Product Voltage | 1.2 V |
| RAM Speed | 2666 MHz |
| RAM Standard | DDR4-2666/PC4-21300 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL19 |
| Rank | Quad Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
This 64GB DDR4-2666 Registered ECC RDIMM with Quad Rank x4 organization is purpose-built for dual-socket server platforms handling memory-intensive virtualization, in-memory databases, and transactional workloads where data integrity is non-negotiable. Its registered architecture stabilizes command and address signals under heavy loading, while the Quad Rank density and ECC engine maximize capacity-per-channel and correct single-bit errors in real time, ensuring continuous operational reliability at 1.2V.
1. ECC protection actively detects and corrects single-bit errors, safeguarding in-memory data integrity for financial transactions and long-running analytics without silent corruption.
2. Registered signal buffering decouples electrical loads for stable multi-DIMM operation, letting hyperscale servers pack far more memory channels without signal degradation.
3. Large module capacity raises virtualization density per server node, allowing significantly more active VMs while retaining memory overhead for peak workloads.
4. Quad Rank organization with x4 DRAMs boosts bank-level parallelism, keeping data pipelines saturated under sustained enterprise read-write pressure.
5. 2666 MT/s transfer rate supplies sufficient per-channel bandwidth to feed fully populated multi-core sockets, avoiding memory bottlenecks in concurrent database queries.
Designed for the modern data center, the Samsung M386A8K40BM2-CTD6Y is a 64GB DDR4-2666 Registered DIMM that transforms server infrastructure with four critical attributes. First, its massive 64GB density allows you to maximize memory per server slot. In a VMware cluster, this directly means hosting far more virtual machines per host without adding nodes, which lowers both hardware footprint and licensing costs. Second, the integrated ECC technology silently corrects single-bit errors in real time. For an in-memory database like SAP HANA, that means your transactional data stays absolutely reliable—one undetected bit flip will no longer corrupt a financial record or stop a critical service. Third, the Registered buffer stages command and address signals, preserving signal integrity even when every DIMM slot is populated. This eliminates boot failures and instability as you scale to terabyte-level footprints, giving you relentless uptime. Finally, the Quad Rank x4 architecture enables overlapping accesses across ranks, dramatically boosting effective bandwidth and reducing latency for heavy concurrent VMs and real-time analytics queries. Together, these capabilities deliver the error-free stability, ultradense capacity, and tuned performance your mission-critical workloads demand.
General Virtualization
For dense virtualization hosts running multiple VMs, install this 64GB RDIMM in sets of six or eight modules per CPU to populate all memory channels while balancing capacity and cost. Aim for 384 GB to 512 GB total per socket using identical quad‑rank DIMMs, and reserve at least one DIMM slot per channel for future expansion without sacrificing NUMA‑balanced bandwidth.
In‑Memory Database
Latency‑sensitive in‑memory databases such as Redis or SAP HANA benefit from the largest possible capacity per server. Fully populate all DIMM slots with these 64 GB DIMMs, ideally two per channel (2DPC) at the supported speed to achieve 1 TB or more per socket, while the registered ECC design guarantees data integrity under sustained heavy write loads.
High‑Performance Computing
HPC clusters require maximum memory bandwidth for parallel simulations. Install one 64 GB DIMM per channel (1DPC) to keep the bus running at full 2666 MT/s without down‑clocking, yielding a balanced 256 GB per eight‑channel processor. Leverage the registered topology for signal stability across large node counts and plan for identical DIMMs across all nodes to maintain deterministic performance.
Validated server memory, compatible with Dell PowerEdge R740/R640, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650.
Q: Can I mix this M386A8K40BM2-CTD6Y with other memory modules of different brands or speeds?
A: Mixing is not recommended for server environments. It may cause instability or POST failures. For guaranteed compatibility and optimal reliability, always install identical modules with the same part number, speed, and rank configuration.
Q: Is this memory compatible with my system?
A: This 64GB DDR4-2666 ECC Registered RDIMM is designed for server platforms supporting Intel Xeon Scalable or AMD EPYC processors. Please verify your motherboard's qualified vendor list (QVL) and ensure support for quad-rank x4 modules.
Q: What is the recommended DIMM population order for optimal performance?
A: Follow your server board's population guide to balance memory channels. Typically, populate identical DIMMs in sets per processor, starting with the farthest slots from the CPU. This ensures maximum bandwidth and interleaving.
Q: Does this module support overclocking or XMP profiles?
A: No. As an enterprise-class JEDEC-compliant RDIMM, it does not support overclocking or XMP. It operates strictly at its rated 2666 MT/s speed with CL19 timings to ensure 24/7 data integrity and long-term reliability.
Q: What warranty and typical failure rate can I expect?
A: This module includes a 1-year warranty. As a manufactured-to-spec OEM-grade RDIMM built with screened components, it exhibits a very low annualized failure rate (AFR), typical of mission-critical server memory.