General

Engineer's Note

This 256GB DDR4-3200 RDIMM with Quad Rank configuration is purpose-built for enterprise servers and memory-intensive workloads such as virtualization and in-memory databases, where the high-rank architecture maximizes capacity density per channel while Registered signaling ensures stable operation under heavy load. Its ECC (Error-Correcting Code) capability, combined with a JEDEC-standard 1.2V low operating voltage, delivers critical data integrity and power efficiency for 24/7 mission-critical environments.

Technical Specs & Insights

1. A 256 GB capacity per module fuels large-scale in-memory computing and dense virtualization, enabling a single server to host substantially more tenants or workloads without expanding its physical footprint.
2. ECC protection silently corrects single-bit memory errors in real time, safeguarding transactional integrity and uptime in financial processing or database operations where even a single flipped bit is unacceptable.
3. The Registered signal type re-drives command and address buses, preserving signal integrity across fully loaded memory channels and ensuring deterministic boot and operation in multi-slot server boards.
4. Quad Rank design integrates four logical ranks on one module, maximizing per-slot capacity while maintaining balanced channel loading, which is critical for sustaining bandwidth under heavy memory access concurrency.
5. DDR4-3200 speed provides 25.6 GB/s of peak bandwidth per channel, accelerating parallel throughput for real-time analytics, AI inference, and content delivery workloads that demand rapid data movement.

Why These Specs Matter

Designed specifically for enterprise servers, the Samsung M386ABG40M51-CAEZQ is a 256GB DDR4-3200 Registered DIMM that directly addresses the critical demands of modern data centers. In a large-scale virtualization cluster, hosting dozens of VMs on a single node demands enormous memory capacity. This module’s massive 256GB density allows you to consolidate workloads onto fewer servers, dramatically reducing data center footprint and licensing costs while ensuring each virtual machine has the headroom to perform without swapping to storage. The Registered signal type tames electrical loading on high-capacity platforms, guaranteeing stable operation even when all memory slots are populated, which prevents unpredictable crashes during peak load.

For an in-memory database like SAP HANA or Redis, data integrity and consistent latency are non-negotiable. The built-in ECC technology detects and corrects single-bit errors silently induced by cosmic radiation or electrical noise, protecting your transactional data from corruption that could lead to financial discrepancies or analytical errors. Meanwhile, the Quad Rank architecture maximizes bandwidth utilization by allowing the memory controller to interleave accesses across four internal ranks, effectively accelerating the real-time query performance that your business analytics depend on. Together, these capabilities ensure your mission-critical services run with uncompromising reliability and speed.

Endurance & Reliability

General Virtualization
For dense VM deployments, populate at least one DIMM per memory channel to maintain balanced bandwidth. A common configuration uses four of these 256GB quad‑rank RDIMMs, delivering 1TB total capacity per socket, which comfortably hosts dozens of moderate‑sized VMs. Leave headroom for hypervisor overhead and avoid mixing ranks within a channel to prevent latency penalties.

In‑Memory Database
Low‑latency, high‑capacity workloads like Redis or SAP HANA demand maximum memory and reduced NUMA effects. Fully populate all eight channels of a dual‑socket server with sixteen modules, achieving 4TB of 3200 MT/s ECC memory at 1.2V. Opt for 1DPC (one DIMM per channel) to sustain the rated CL22 speed while preserving signal integrity under heavy read/write pressure.

High‑Performance Computing
HPC clusters favor bandwidth over absolute capacity for simulations and model training. Configure eight modules across eight channels (1DPC) to attain peak theoretical bandwidth, then add a second identical set only if job footprints exceed 2TB per node. Quad‑rank modules already provide ample bank interleaving; further scaling should maintain symmetry across all memory controllers to avoid bottlenecks during MPI collectives.

Verified Compatibility

Rigorously tested server memory, compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen11, Lenovo ThinkSystem SR650 V3.

FAQ