General

Engineer's Note

This 2GB DDR3-1333 UDIMM with ECC and a low 1.35V operating voltage is ideally suited for entry-level servers and workstations where power efficiency and data integrity are critical. Its single-rank x8 organization ensures broad compatibility and stable unbuffered signaling, while the CL9 latency delivers responsive performance for light virtualized or memory-sensitive applications.

Technical Specs & Insights

1. ECC protection silently corrects single-bit errors in real time, preserving data integrity during long-running batch jobs and financial transactions where even one miscalculated bit is unacceptable.
2. DDR3L low-voltage operation curbs energy consumption and waste heat at the rack level, directly lowering power bills and cooling overhead in dense server farms.
3. A steady 1333MHz clock rate reliably handles concurrent lightweight containers and file-sharing services, ensuring responsive access under continuous multi-user workloads.
4. The unbuffered UDIMM architecture shortens electrical paths to reduce latency, suiting cost-conscious single-socket servers that still demand error detection for critical data.
5. Single-rank construction presents a lighter electrical load to the memory controller, enhancing signal stability and compatibility in space-constrained micro-server nodes.

Why These Specs Matter

The MT9KSF25672AZ-1G4 is a DDR3 UDIMM with ECC, purpose-built for single-socket servers and entry-level workstations where data integrity and energy efficiency directly impact business outcomes. Its most critical capability is ECC error correction. In a virtualized cluster running multiple lightweight VMs or containers, a single-bit memory flip in unbuffered memory can silently corrupt a hypervisor page table, cascading into unexplained crashes or data loss. ECC detects and corrects these events in real time, preserving uptime without manual intervention.

Equally vital is the 1.35V low-voltage operation. When deploying a fleet of microservers for a Redis or Memcached caching layer, the cumulative thermal load from 1.5V modules can push cooling infrastructure beyond its efficient zone. This module’s reduced voltage lowers power draw and waste heat per node, directly shrinking the total cost of ownership across a 24/7 environment. The unbuffered, single-rank x8 organization at 1333MHz and CL9 provides deterministic, low-latency access—essential for in-memory databases where query response times are measured in microseconds, and even slight latency jitter amplifies under concurrent client loads. Together, these features turn a 2GB UDIMM into a precision component that safeguards transactional accuracy and operational stability in environments where memory errors are not an option.

Endurance & Reliability

Based on the specifications—DDR3, ECC, Unbuffered, 240-pin UDIMM—this is a server memory module designed for entry-level servers and workstations requiring data integrity. Below is capacity planning for typical server workloads.

General Virtualization
Virtualization demands balanced capacity and bandwidth. Deploy these 2 GB modules in identical sets across all memory channels of each CPU (e.g., six modules for triple‑channel, eight for quad‑channel) to enable interleaving. This symmetric configuration maximizes throughput and provides predictable performance for multiple VMs. The 1.35 V low‑voltage operation reduces overall power draw in dense, always‑on virtualized hosts.

In‑Memory Database
In‑memory databases require large, reliable RAM to host entire datasets. Populate every DIMM slot with these 2 GB ECC UDIMMs to reach the maximum supported capacity while maintaining chip-kill protection. Use balanced configurations across all memory controllers to minimize latency. The low voltage reduces thermal stress, helping maintain consistent memory responsiveness during sustained heavy reads and writes.

HPC
High‑performance computing needs peak bandwidth from clean, uniform channels. Install one module per channel across all channels (1DPC) to avoid rank‑loading penalties and sustain 1333 MT/s throughput. The single‑rank x8 organization of these DIMMs presents a light electrical load, ensuring stable signal integrity. Multi‑node clusters benefit from the ECC capability, reducing silent data corruption in long‑running parallel jobs.

Verified Compatibility

This rigorously tested server memory is compatible with Dell PowerEdge T110 II, HP ProLiant MicroServer Gen8, and Lenovo ThinkServer TS140.

FAQ