General

Engineer's Note

This 64GB DDR4-2933 registered ECC module is a server-class memory component purpose-built for virtualization hosts, in-memory databases, and heavy multi-tenant workloads on enterprise platforms such as dual-socket Xeon or EPYC systems. Its Quad Rank x4 organization maximizes capacity density per channel, while the registered signal buffering and ECC actively safeguard data integrity under sustained load.

Technical Specs & Insights

1. Registered signal type ensures clean command/address signals across fully populated server boards, preserving data integrity in multi-slot configurations.
2. ECC protection actively corrects single-bit memory errors, a non-negotiable safeguard for financial transactions and long-running analytics workloads.
3. Quad Rank x4 organization maximizes per-channel capacity density, empowering virtualization hosts to accommodate more VMs without sacrificing memory speed.
4. The 64GB capacity per module dramatically reduces physical DIMM count, freeing up valuable server real estate and lowering cooling overhead in dense rack deployments.
5. DDR4-2933 memory bandwidth accelerates in-memory databases and real-time processing, cutting latency-sensitive response times under heavy concurrent requests.

Why These Specs Matter

The M386A8K40DM2-CVF is a 64GB DDR4-2933 Registered DIMM built for servers, and its design directly addresses the realities of enterprise data centers where reliability, density, and predictable performance are non-negotiable. Its ECC technology continuously detects and corrects single-bit errors, preventing silent data corruption that could crash virtualized workloads or compromise financial transactions in an in-memory database. The registered clock buffer stabilizes signal distribution, so when you fully populate a 24-slot server to support dense virtual machine clusters, you avoid timing failures and keep all memory channels operational. The quad-rank x4 organization enables this module’s massive 64GB capacity while leveraging rank interleaving to boost concurrency: multiple ranks can be accessed in overlapping cycles, cutting latency for large in-memory datasets where every nanosecond impacts query throughput. A 2933 MT/s speed and 1.2V operating voltage balance high bandwidth with power efficiency, lowering cooling overhead in a 2U node running SAP HANA or a hypervisor farm. In essence, this memory translates directly into fewer application stalls, higher VM density per server, and guarded data integrity at scale.

Endurance & Reliability

This 64GB PC4-23400 RDIMM (M386A8K40DM2-CVF) is a server memory module with ECC and registered signaling. Below are capacity planning scenarios for common data‑center workloads.

General Virtualization
Install four of these 64GB DIMMs in a dual‑socket host – two modules per CPU – to deliver a balanced 256GB capacity pool. This one‑DIMM‑per‑channel configuration runs at the full 2933MT/s speed and comfortably supports 20–30 typical virtual machines. When consolidation density increases, simply expand to eight modules (512GB) to preserve performance headroom without re‑architecture.

In-Memory Database
Maximise dataset locality by populating every available slot; a 24‑slot dual‑socket server reaches 1.5TB, keeping multi‑terabyte databases entirely in RAM. The quad‑rank x4 design and ECC ensure robust signal integrity, while memory mirroring or sparing modes provide the high availability required for mission‑critical transactional systems.

High-Performance Computing (HPC)
Use exactly one DIMM per memory channel – typically eight modules for 512GB on an eight‑channel platform – to saturate bandwidth without triggering speed downgrades. The 2933MT/s registered architecture and quad‑rank organisation deliver the low‑latency, high‑throughput data streams essential for computational fluid dynamics, weather models, and genomic analysis.

Verified Compatibility

Rigorously tested for server compatibility with Dell PowerEdge R740/R750, HPE DL380 Gen10, and Lenovo SR650.

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