General

Engineer's Note

Engineered for server platforms, this 32GB DDR4-2666 Registered ECC DIMM leverages a Dual Rank x4 configuration to enhance memory interleaving and throughput, directly benefiting memory-intensive workloads such as virtualization and in-memory databases. Its ECC and registered signal type ensure end-to-end data integrity and signal stability in high-density deployments, with a CAS latency of CL19 maintaining responsive access under sustained load.

Technical Specs & Insights

1. End-to-end error correction safeguards data integrity in mission-critical databases and financial transactions, virtually eliminating silent data corruption.
2. Registered signal topology stabilizes command signals across densely populated server boards, enabling large-scale memory configurations without compromising signal integrity.
3. Dual Rank x4 architecture interleaves memory accesses to fully saturate channels, delivering consistent throughput for virtualized workloads under heavy consolidation.
4. Generous module capacity supports higher virtual machine density per server, reducing additional hardware acquisitions and optimizing data center footprint.
5. Ultra-low operating voltage curbs power draw and thermals across rack-scale deployments, slashing cooling overhead and improving energy efficiency.

Why These Specs Matter

The M393A4K40BB2-CTD8Q is a 32GB DDR4-2666 server RDIMM engineered for reliability-driven enterprise environments, and its four defining attributes translate directly into operational peace of mind. ECC is your silent guardian against data corruption: in a financial in-memory database handling millions of transactions, a single background-radiation-induced bit-flip could silently distort a balance sheet, but ECC detects and corrects that error in real time, preserving accuracy where it is non-negotiable. The registered buffer is what makes dense memory configurations viable—without it, populating all 24 DIMM slots would degrade signal integrity and force you to throttle speed. With this module, you can scale a virtualized cluster to several terabytes of stable RAM, hosting hundreds of VMs on a single node without boot failures or intermittent crashes. Its Dual Rank x4 organization then goes a step further by enabling rank interleaving, which pipelines memory accesses to unlock higher effective bandwidth; this means an in-memory analytics platform like a Redis cluster or SAP HANA instance serves queries faster under concurrent loads, cutting latency when every millisecond impacts user experience. Finally, the 1.2V ultra-low voltage reduces both power draw and thermal stress in tightly packed racks, directly lowering your cooling overhead. From hyper-converged infrastructure to large-scale virtualization, this memory turns critical workload demands into unwavering uptime and total cost efficiency.

Endurance & Reliability

General Virtualization
Populate all memory channels per processor with identical 32GB RDIMMs to ensure balanced capacity and consistent access latency. A dual‑socket server using 16 of these modules delivers 512GB, comfortably supporting over 50 mixed virtual machines. ECC protection is essential for preventing multi‑tenant data corruption.

In‑Memory Database
For platforms like Redis or SAP HANA, install these dual‑rank RDIMMs in every available slot to maximize capacity, even if the memory speed drops to 2133MT/s under full population. A 24‑DIMM node provides 768GB for large in‑memory datasets, and the registered buffer preserves signal integrity at high densities.

High‑Performance Computing (HPC)
Bandwidth‑sensitive workloads benefit from one DIMM per channel to sustain the full DDR4‑2666 speed. A dual‑socket system with eight populated channels per CPU yields 512GB at peak throughput, ideal for memory‑bound simulations. ECC reliability safeguards numerical accuracy during long‑running jobs.

Verified Compatibility

Samsung M393A4K40BB2-CTD8Q 32GB DDR4-2666 RDIMM rigorously tested, compatible with Dell PowerEdge R740, HPE DL380 Gen10, Lenovo SR650.

FAQ