General

Engineer's Note

This ECC Unbuffered DIMM (UDIMM) in DDR4-2400 is purpose-built for entry-level single-socket servers and professional workstations that demand hardware-level data integrity for error-sensitive workloads like light virtualization, file servers, and financial calculation. Its dual-rank x8 configuration boosts memory bandwidth utilization through interleaving, while the integrated ECC engine corrects single-bit errors in real time, complementing the pure signaling of unbuffered design to ensure uninterrupted reliability in 24/7 operation.

Technical Specs & Insights

1. ECC error correction silently detects and corrects single-bit memory faults, preserving transactional integrity for mission-critical databases and eliminating costly downtime.

2. Dual Rank x8 organization boosts bank interleaving efficiency, delivering sustained bandwidth that keeps latency-sensitive virtual machines responsive under heavy consolidation.

3. Unbuffered signal topology reduces command-to-data latency, a direct advantage for real-time analytics and high-frequency trading platforms where every nanosecond translates to revenue.

4. Low voltage operation trims the thermal envelope of densely populated server racks, improving energy efficiency and long-term hardware reliability in always-on environments.

5. Standard DDR4 module capacity provides a flexible building block for cost-effective memory scaling, allowing IT teams to balance workload demand and budget across heterogeneous server fleets.

Why These Specs Matter

Designed as a server-grade UDIMM, the Samsung M391A1G43EB1-CRC is built for small-to-medium business servers and entry-level workstations where cost-effective reliability is non-negotiable. Its true ECC engine actively corrects single-bit memory errors, meaning your virtualized file servers and lightweight database applications stay running accurately around the clock instead of suffering silent data corruption. The unbuffered architecture deliberately avoids additional latency and power overhead, giving hypervisors like VMware ESXi a slightly faster interrupt response when multiple VMs contend for resources—critical when your invoice system and CRM coexist on one host. A dual-rank x8 organization interleaves memory banks, so during heavy multitasking or in-memory analytics, the processor sees substantially higher sustained bandwidth, preventing the stutter that plagues single-rank configs. Finally, at a mere 1.2 V, this DDR4-2400 module reduces thermal stress inside compact tower server chassis, keeping fan speeds low and energy bills predictable. For the IT manager upgrading a provisioning server or an engineer crunching CAD datasets, these four attributes translate directly to fewer mystery crashes, tighter multi-threaded performance, and a hardware platform that simply stays out of your way.

Endurance & Reliability

This is a DDR4-2400 ECC Unbuffered 288-pin UDIMM, server memory intended for platforms that require data integrity. Below are capacity planning recommendations for three common server workloads.

General Virtualization
Balance capacity across all memory channels. Install one 8 GB module per channel (e.g., 4 DIMMs for quad-channel) to preserve bandwidth. Scale to two modules per channel (8×8 GB) if hosting many VMs, ensuring identical dual-rank DIMMs.

In-Memory Database
Maximize capacity with fully populated channels. Populate each channel with two 8 GB ECC UDIMMs for 64–128 GB configurations depending on channel count. All modules must be identical to avoid ECC issues, allowing the dataset to reside entirely in memory.

High-Performance Computing
Prioritize symmetric, per-channel population for peak bandwidth. Install one 8 GB dual-rank DIMM in every memory channel (6 or 8 DIMMs) to keep all channels active at DDR4-2400. Add a second set only if capacity is more critical than maintaining full speed.

Verified Compatibility

Rigorously tested for servers: compatible with Dell PowerEdge T340, HPE ProLiant ML30 Gen10, Lenovo ThinkSystem ST250.

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