General

Engineer's Note

This 128GB DDR4-2400 RDIMM with ECC is purpose-built for enterprise servers and demanding memory-intensive workloads such as virtualization, in-memory databases, and large-scale data analytics. Its octal-rank x4 configuration maximizes capacity density per channel while the registered signal buffering stabilizes command/address signals under heavy load, and the ECC engine ensures data integrity by transparently correcting single-bit errors.

Technical Specs & Insights

1. 128GB capacity per module maximizes memory density per slot, allowing virtualization hosts to run more VMs and larger in-memory databases without scaling out hardware.
2. ECC protection silently corrects single-bit errors and detects multi-bit faults, safeguarding transactional data integrity in financial or database servers where undetected corruption is unacceptable.
3. Registered signal buffering decouples the electrical load from the memory controller, ensuring stable operation even when all memory channels are fully populated across a large server chassis.
4. Octal Rank x4 organization keeps the memory controller’s banks deeply interleaved, sustaining peak bandwidth under heavy multi-threaded workloads like real-time analytics and large-scale virtualization.
5. DDR4-2400 speed delivers a balanced profile of consistent throughput and low power, offering predictable performance for enterprise applications that prioritize reliability over aggressive overclocking.

Why These Specs Matter

The M386AAK40B40-CTC5Q is an RDIMM built for server infrastructure, and every aspect of its design addresses real-world data center pain points. In a dense virtualization cluster running dozens of VMs on a single node, the 128 GB capacity with Octal Rank x4 organization becomes a tangible asset: it allows you to pack far more active guests per socket, slashing software licensing and power costs without crippling memory bandwidth. At the same time, its Registered signal type buffers command and address lines, preserving signal integrity across the large capacity so your hypervisor stays responsive even when fully loaded.

The second critical scenario is an in-memory database like SAP HANA or a high-frequency trading cache. Here, the ECC engine is non-negotiable. A single bit flip due to background radiation could corrupt a financial transaction or bring down a real-time analytics app. With hardware error correction, those silent data corruptions are detected and repaired instantly, safeguarding your business logic. Paired with the 1.2 V DDR4-2400 efficiency and a true CL17 latency, the module delivers sustained performance while keeping thermal and power footprints low, making it a cornerstone for any reliability-first deployment.

Endurance & Reliability

General Virtualization
This 128GB DDR4-2400 ECC RDIMM offers exceptional density for virtualized servers. Install two modules per CPU to deliver 256GB per socket, comfortably hosting dozens of standard VMs. The Registered ECC feature ensures strong data integrity across multi-tenant workloads.

In-Memory Database
Maximize capacity and bandwidth by populating all memory channels with a single 128GB RDIMM each, avoiding performance penalties from multi-DIMM channels. This yields 384GB to 768GB per node for large in-memory datasets. The Octal Rank x4 construction and CL17 latency deliver consistent high throughput under heavy query loads.

High-Performance Computing
For HPC, balance density and speed by installing one module per channel, achieving 384GB or more per node while maintaining low latency. The 1.2V operation reduces power draw across dense compute racks. A symmetric NUMA configuration further enhances parallel processing stability and overall cluster efficiency.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650, and more.

FAQ