General

Engineer's Note

This ECC Unbuffered DDR3 module is purpose-built for entry-level servers and workstations requiring data integrity, utilizing error-correcting code to prevent single-bit memory errors in critical applications such as file servers or light virtualization. Its low-latency CL7 timing and dual-rank x8 configuration deliver a balance of responsiveness and density, ensuring stable performance on older AMD or Intel platforms that demand reliable UDIMM ECC memory.

Technical Specs & Insights

1. ECC protection detects and corrects single-bit memory errors on the fly, safeguarding data integrity for critical financial transactions and preventing silent corruption in always-on server environments.
2. Unbuffered signal topology eliminates register latency, delivering snappy kernel response that benefits single-socket servers running latency-sensitive network services.
3. Dual rank interleaving keeps the memory pipeline fed efficiently, sustaining consistent throughput for lightweight virtualization hosts and containerized workloads.
4. The targeted module capacity suits dedicated appliance servers and entry-level NAS deployments, where predictable, low-overhead memory allocation keeps total cost and power strictly in check.
5. Standard 1.5V operation guarantees seamless compatibility with a broad install base of legacy DDR3 server boards, reducing validation effort during fleet upgrades.

Why These Specs Matter

Designed for entry-level servers and critical workstations, the Samsung M391B5673DZ1-CF8 is a 2GB DDR3 UDIMM that addresses real-world reliability and performance challenges where consumer memory simply cannot keep up. Its ECC functionality actively corrects single-bit memory errors caused by background radiation, directly preventing silent data corruption in virtualized clusters running multiple guest machines on a hypervisor. When a bit flip in your virtualization host goes undetected, it can crash numerous services simultaneously—this module eliminates that risk. Equally vital for in-memory databases like Redis or Memcached, the true Dual Rank x8 organization enables rank interleaving, overlapping data transfers to sustain higher effective bandwidth, so frequent small-request workloads experience lower latency during peak transaction loads. The CL7 latency further reduces the access delay, accelerating query response times. Operating at a standard 1.5V with 240-pin UDIMM compatibility, it draws conservative power and slots easily into tower servers or single-socket workstations, ensuring transparent system integration without the signal buffering overhead of registered modules. For small business virtualization and light database acceleration, these four traits—active error correction, efficient rank interleaving, tight CAS timing, and broad electrical compatibility—translate directly into prolonged uptime and responsive application performance.

Endurance & Reliability

This is a DDR3-1066 ECC Unbuffered DIMM (2GB, dual-rank, CL7) for server platforms.

General Virtualization
Populate all memory channels evenly with these 2GB UDIMMs to maximize VM density. A dual-socket server with 18 slots can reach 36GB, supporting around 15–20 light VMs. Balance modules across channels to sustain 1066MHz interleaving and monitor ECC events for stability.

In-Memory Database
Capacity and reliability are critical. Fully load the server’s DIMM slots—24 modules provide 48GB, sufficient for modest in-memory datasets. Configure one DIMM per channel to avoid speed downgrades, and leverage ECC to prevent data corruption during intensive read/write operations.

High-Performance Computing
Bandwidth matters more than capacity. Use 12 modules (6 per processor, one per channel) for 24GB in a dual-channel-per-socket server. This ensures full 1066MHz throughput with interleaved access, while ECC guards long-running parallel jobs against silent memory errors.

Verified Compatibility

Rigorously validated server memory, compatible with Dell PowerEdge R210 II, T110 II, HP ProLiant ML110 G7.

FAQ