General

Engineer's Note

This DDR3 UDIMM with ECC and a low 1.35V operating voltage is purpose-built for entry-level servers, microservers, and network-attached storage platforms where data integrity and energy efficiency are paramount. The dual-rank x8 configuration enhances bank-level interleaving for superior throughput, while ECC protection corrects single-bit errors to prevent data corruption in always-on, memory-sensitive workloads.

Technical Specs & Insights

1. ECC error correction silently detects and corrects single-bit memory errors, preserving transactional integrity in always-on server environments where uptime and data accuracy are non-negotiable.
2. Dual Rank x8 organization keeps the memory controller efficiently fed with data, reducing idle cycles and boosting throughput for virtualized workloads and lightweight database operations.
3. A modest four-gigabyte capacity per module serves as an economical, power-efficient building block for dedicated hosting appliances, edge gateways, or DNS caches where density matters less than stability.
4. Operating at a low voltage of 1.35V cuts overall server power draw and reduces waste heat, directly lowering cooling overhead and extending service life in dense rack deployments.
5. The 1333MHz bus speed strikes a practical balance between bandwidth and latency, delivering snappy response under concurrent network services while maintaining broad compatibility with legacy server platforms.

Why These Specs Matter

The MT18KSF51272AZ-1G4 is a 240-pin DDR3 UDIMM built with ECC, clearly positioning it for server and workstation environments where data integrity is non-negotiable. In a virtualized cluster hosting multiple VMs, a single undetected bit flip in memory can cascade into corrupted guest operating systems, silent data loss, and unplanned downtime. The module’s ECC engine actively detects and corrects single-bit errors, turning what could be a 3 a.m. outage into a non-event. Its dual rank x8 organization interleaves memory banks, enabling the memory controller to overlap commands and boost sustained bandwidth — crucial when your in-memory database is serving thousands of concurrent queries under tight latency budgets. Operating at 1.35V, this DDR3L module draws less power than standard 1.5V alternatives, reducing thermal load inside dense 1U chassis and lowering your facility’s energy cost over a fleet of nodes. While registered DIMMs buffer address lines for massive capacities, this unbuffered design eliminates that added clock cycle, delivering lower latency that benefits latency-sensitive applications such as high-frequency trading engines or real-time analytics. In these scenarios, ECC protects your transactions, low voltage preserves uptime by easing cooling, and dual rank ensures your CPU’s memory pipeline stays fed — making this module a calculated choice for reliability-driven infrastructure.

Endurance & Reliability

Based on the provided specifications — a 4GB DDR3-1333 ECC Unbuffered UDIMM with 1.35V low voltage and 240-pin form factor — this memory module is classified as server memory, typically deployed in entry-level single-socket servers, micro-servers, or small office NAS appliances where ECC data integrity is required.

General Virtualization
With only 4GB per module, you need high-density population to meet hypervisor overhead and guest memory demands. For light virtualization (2–4 VMs), install at least four modules (16GB total) to provide headroom; critical environments should aim for 32GB using eight such DIMMs, configuring balanced channels for optimum memory bandwidth.

In-Memory Database
In-memory workloads demand extremely low latency and large capacity, making this module size a limitation. Use the maximum number of modules your motherboard supports (often 32–64GB total) and collocate data sets aggressively. However, for production-grade Redis or SAP HANA scenarios, replacing these with higher-capacity registered DIMMs is strongly advised.

HPC
HPC clusters often rely on per-core memory bandwidth. Fill all available channels — typically six or eight modules — to enable the highest interleaving and bandwidth, even if total capacity seems modest. For parallel MPI jobs, this configuration balances small capacity with maximum channel concurrency, favoring burst throughput over capacity.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge R210 II, T110 II, and HP ProLiant ML110 G7.

FAQ