General

Engineer's Note

This 64GB DDR4-2133 Registered ECC module (M386A8K40BM1-CPB00) is purpose-built for enterprise servers and high-end workstations handling virtualization and in-memory database workloads. Its quad-rank x4 configuration, driven by a registered signal path and robust ECC algorithm, ensures uncompromised signal integrity and data integrity under heavy, sustained loads while achieving a tight CL15 latency.

Technical Specs & Insights

1. 64GB capacity per module maximizes memory density in server nodes, enabling a larger number of virtual machines per physical host without sacrificing dedicated RAM allocation.
2. ECC error correction actively detects and repairs single-bit data corruption, preserving data integrity for mission-critical enterprise databases and financial transactions.
3. Registered signal buffering stabilizes high-capacity memory configurations, allowing fully populated server boards to operate reliably under continuous 24/7 workloads.
4. Quad Rank x4 organization increases interleaving opportunities across DRAM banks, sustaining higher bandwidth efficiency for in-memory analytics and virtualized infrastructure.
5. CL15 latency reduces the access delay to fetched data, improving response times for latency-sensitive applications like high-frequency trading or real-time caching services.

Why These Specs Matter

When deploying mission‑critical server infrastructure, data integrity and scalability are non‑negotiable, which is why the M386A8K40BM1-CPB00 Registered ECC DDR4 module defines the standard. As a server‑class RDIMM, its Error Correcting Code (ECC) technology actively detects and corrects single‑bit memory errors caused by cosmic radiation or electrical noise — a silent threat that can corrupt financial transactions or database records without warning. In a dense virtualization cluster hosting dozens of virtual machines, the Registered buffer isolates the memory controller from excessive electrical loading, enabling you to populate all channels with high‑capacity 64 GB modules without sacrificing signal stability. That directly translates to reliable multi‑tenant consolidation where each VM demands guaranteed memory resources. For in‑memory databases like SAP HANA or large Redis clusters, the Quad Rank x4 organization offers the deep rank interleaving that sustains bandwidth under heavy concurrent access, keeping real‑time analytics responsive even during peak loads. The 1.2 V ultra‑low operating voltage further lowers thermal dissipation across a sprawling data centre, reducing cooling costs while preserving 2133 MT/s throughput. Together, these four characteristics — ECC protection, Registered buffering, dense Quad Rank capacity, and energy‑efficient design — ensure your servers deliver uninterrupted performance and data accuracy in workloads where every bit matters.

Endurance & Reliability

General Virtualization
For dense VM hosting, install at least 8 of these 64GB Registered ECC modules (512 GB total) across a dual‑socket server’s memory channels, evenly populating all channels per CPU to ensure balanced NUMA access. Because these are quad‑rank DIMMs, limit to two DIMMs per channel to avoid aggressive speed downgrades; a 1‑DIMM‑per‑channel (1DPC) layout preserves the full 2133 MHz clock and provides ample headroom for moderate overcommitment.

In‑Memory Database
Maximize capacity by installing 12 or 24 modules in a platform that supports 1.5 TB or more per socket, enabling large in‑memory datasets (e.g., SAP HANA, Redis). To sustain low latency, prefer 1DPC where possible: quad‑rank DIMMs at 2DPC may drop to 1866 MHz, so weigh the capacity gain against the bandwidth trade‑off. Always use identical modules across both sockets to avoid NUMA imbalances that can starve critical database threads.

High Performance Computing (HPC)
Bandwidth‑sensitive HPC workloads benefit from a fully populated, balanced memory subsystem. Install one DIMM per channel on every memory controller – typically 8 modules per dual‑socket node (512 GB) – to maintain the 2133 MT/s speed and maximize available rank interleaving from the quad‑rank organization. This configuration provides up to 136 GB/s of theoretical bandwidth per socket (eight channels × 2133 × 8 bytes), essential for memory‑bound simulations while keeping power and thermals predictable.

Verified Compatibility

Compatible servers: Dell PowerEdge R740, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650. Rigorously validated.

FAQ