General

Engineer's Note

Designed for enterprise server platforms, this 128GB DDR4-2400 RDIMM excels in memory-intensive workloads such as virtualization, in-memory databases, and large-scale data analytics. Its octal-rank x4 organization with registered ECC ensures maximum data integrity and signal stability, allowing dense memory configurations while effectively correcting single-bit errors and detecting multi-bit faults.

Technical Specs & Insights

1. Massive per-module capacity empowers dense server configurations, effortlessly accommodating expanding virtual machine fleets and large-scale in-memory datasets.
2. ECC error correction provides continuous data integrity, eliminating the risk of silent corruption during round-the-clock financial or healthcare transaction processing.
3. The registered design buffers command and address signals, maintaining signal cleanliness and operational reliability across fully populated multi-DIMM channels.
4. Octal Rank x4 architecture fits the highest possible rank count onto a single stick, maximizing bank-level parallelism for memory-intensive enterprise applications.
5. Energy-efficient low-voltage operation reduces total power consumption across server racks, lowering cooling costs without sacrificing data reliability.

Why These Specs Matter

As a Registered DIMM engineered specifically for server platforms, the Samsung M386AAK40B40-CUC40 directly addresses the critical pain points of enterprise data centers. Its combination of ECC, a registered interface, massive 128GB capacity through octal rank architecture, and 1.2V DDR4 efficiency transforms how mission-critical workloads operate. In a dense virtualization cluster, silent data corruption is catastrophic; the built-in ECC proactively detects and corrects single-bit errors caused by cosmic radiation or electrical noise, ensuring that dozens of virtual machines can run for months without memory-induced crashes or data corruption. This integrity is non-negotiable for financial transaction databases.

Furthermore, the registered buffer component regenerates command and address signals, stabilizing the electrical load when populating all 24 DIMM slots of a dual-socket server. This allows you to confidently max out total system capacity for an in-memory database like SAP HANA, where the 128GB octal rank module delivers not just density but also the high bank interleaving needed to sustain aggressive real-time analytics without throttling. The 1.2V operating voltage reduces thermal output across a server farm, lowering cooling costs and improving long-term reliability. For your enterprise, this module means uncompromising uptime, consistent low latency under massive concurrent access, and a server platform that scales safely, turning 128GB of raw capacity into a fortress of seamless performance.

Endurance & Reliability

General Virtualization
This 128GB DDR4-2400 RDIMM is ideal for dense virtualization hosts running multiple VMs. With a single module providing substantial capacity, you can populate one DIMM per channel in a dual-socket server—two modules give 256GB, sufficient for 30–50 moderate VMs. For greater memory bandwidth in NUMA-aware hypervisors, deploy six or eight identical modules to fill all channels while leaving room for future expansion.

In-Memory Database
Large-capacity registered ECC memory is critical for in-memory databases like SAP HANA or Redis clusters. A single 128GB DIMM lets you configure 512GB using just four modules, keeping clocks and ranks balanced. For write-intensive workloads, populate all memory channels symmetrically—this octal-rank module trades a slight latency penalty for enormous capacity, so favor depth over minimal CAS latency to hold entire datasets in RAM.

High-Performance Computing (HPC)
In memory-bandwidth-bound HPC applications, populate every channel evenly to maximize throughput. A balanced configuration of eight 128GB RDIMMs yields 1TB of reliable ECC-protected memory per node. While the 2400MT/s speed is moderate, the octal-rank design doubles capacity per socket, which benefits large-scale simulations and genome assembly. Pair with identical modules across all channels to avoid performance imbalances from rank interleaving mismatches.

Verified Compatibility

Rigorously tested, this server memory ensures compatibility with Dell PowerEdge R740, HP ProLiant DL380 Gen10, and Lenovo ThinkSystem SR650.

FAQ