General

Engineer's Note

This unbuffered ECC DDR3 module is designed for entry-level servers and workstations where data integrity is critical, making it well-suited for small business file servers, NAS appliances, or budget-conscious professional workstations. Its dual-rank x8 organization maximizes memory bandwidth efficiency and interleaving, while the ECC capability corrects single-bit errors on the fly and the unbuffered signal type minimizes latency for responsive operation in data-sensitive workloads.

Technical Specs & Insights

1. ECC protection silently corrects single-bit errors, safeguarding data integrity in always-on virtualization nodes and financial transaction servers.
2. Dual Rank x8 organization interleaves bank accesses to sustain high memory bandwidth, preventing throughput bottlenecks under heavy multi-tenant workloads.
3. 1333MHz clock speed provides predictable and steady data transfers, essential for legacy enterprise databases that demand consistent latency.
4. Unbuffered signal path eliminates register delays, reducing access latency for latency-sensitive caching and in-memory computing tasks.
5. 1.5V standard voltage adheres to JEDEC specifications, ensuring broad platform compatibility and stable power delivery in dense rack deployments.

Why These Specs Matter

The Micron MT18JSF25672AZ-1G4F1 is a server-grade DDR3 UDIMM engineered for reliability-driven workloads. Its defining feature is ECC error correction, which actively detects and corrects single-bit memory errors caused by background radiation or electrical noise. In a small business file server or a network-attached storage appliance running 24/7, even a single uncorrected bit flip can silently corrupt financial records or compromise filesystem integrity over weeks of uptime. ECC transforms that risk into a non-issue, ensuring your data remains mathematically consistent. The unbuffered, dual-rank x8 organization strikes a pragmatic balance: it avoids the added cost and latency of registered buffers, while dual-rank interleaving elevates effective bandwidth for modest virtualization hosts. When you are running two lightweight virtual machines on a home lab ESXi box—perhaps a firewall appliance and a Linux DNS server—the 1333MHz speed and CL9 latency keep the hypervisor responsive under concurrent access without requiring expensive RDIMM platforms. At 1.5V, this module adheres to standard DDR3 power envelopes, generating predictable thermals inside compact micro-ATX server chassis where passive cooling is often the norm. The 240-pin UDIMM form factor guarantees straightforward drop-in compatibility with entry-level Intel Xeon E3 or AMD Opteron 1300 series boards, making it a cost-effective building block for reliability-centered deployments where every byte matters.

Endurance & Reliability

Capacity Planning Guide for a 2GB DDR3-1333 ECC Unbuffered DIMM (Server Memory)

This module is an ECC Unbuffered DDR3 UDIMM designed for entry-level servers and workstations. Its error correction and dual-rank x8 organization suit reliability-focused deployments where moderate capacity is built from multiple identical sticks. Plan channel population carefully to balance capacity, bandwidth, and cost in each workload.

General Virtualization
For virtualizing light to moderate workloads, aim for 24–32 GB per host to support comfortable consolidation ratios. Using this 2 GB module, install 12–16 identical DIMMs in a balanced multi-channel configuration (e.g., three DIMMs per channel on a quad-channel platform). Symmetric population guarantees consistent memory access latencies across VMs and avoids NUMA penalties.

In-Memory Database
In-memory databases like Redis or Memcached demand the highest available capacity and absolute data integrity. Populate every DIMM slot with this 2 GB ECC UDIMM to reach the platform’s maximum—often 48–96 GB on dual-socket boards. ECC is mandatory to prevent silent bit errors in cached data, while the dual-rank design improves rank-interleaving throughput under heavy read/write pressure.

High-Performance Computing (HPC)
HPC clusters prioritize bandwidth-sensitive memory hierarchies over raw capacity. Deploy one identical DIMM per channel (e.g., 8 modules for 16 GB total on an 8-channel system) to enable full channel interleaving and lowest command rate. The ECC feature safeguards long-running simulation integrity, and matching 1333 MHz speed across all channels eliminates clock skew, delivering predictable throughput for tightly coupled parallel tasks.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge R210, R310, T110 and HP ProLiant ML110 G6.

FAQ