General

Engineer's Note

This UDIMM with ECC is a server-class module ideally suited for entry-level servers or workstations running memory-intensive, data-critical workloads such as virtualization and small-scale databases. The DDR3-1866 CL13 timing delivers lower latency compared to standard DDR3-1600 modules, while the dual rank x8 configuration and ECC error correction ensure stable, reliable data integrity under sustained load.

Technical Specs & Insights

1. The ECC protection automatically corrects single-bit memory errors in real time, preventing silent data corruption for financial transactions and critical business databases that demand 24/7 uptime.
2. With eight gigabytes of capacity, the module comfortably hosts multiple lightweight virtual machines or containers on a single-socket server, maximizing consolidation density for basic enterprise applications.
3. The high 1866 MHz data rate doubles the peak bandwidth versus baseline DDR3, allowing faster in-memory caching of frequently accessed files and smoother concurrent request handling in entry-level NAS or web servers.
4. Dual-rank x8 organization interleaves memory accesses across two internal ranks, maintaining consistent throughput even when multiple VMs compete for memory, which is essential for stable virtualized workloads.
5. Unbuffered signaling eliminates the register latency found in RDIMMs, delivering marginally tighter command-to-data timing that benefits latency-sensitive applications like lightweight database lookups on cost-optimized server builds.

Why These Specs Matter

The Samsung M391B1G73QH0-CMA DDR3 UDIMM is purpose-built for entry-level servers and workstations. Its four defining traits directly solve real-world problems. ECC protection continuously corrects single-bit memory errors induced by cosmic rays or electrical noise, preventing silent data corruption that can crash a hypervisor and bring down your entire virtualized cluster. The 1866MHz frequency and dual-rank x8 design generate ample bandwidth; interleaving across two ranks delivers up to 15% higher throughput than single-rank equivalents, which is crucial when hosting several virtual machines or running an in-memory database like Redis—it means faster queries and stable performance under load. The unbuffered signal path trims access latency, giving you an edge in real-time analytics and high-frequency trading simulations. Moreover, the standard 1.5V voltage guarantees broad platform compatibility, simplifying deployment. For small business servers, testing labs, or database nodes, this module offers a dependable blend of speed and error resilience.

Endurance & Reliability

General Virtualization
For virtualized environments, the M391B1G73QH0-CMA’s unbuffered ECC corrects single-bit errors, ensuring host stability. Start with four 8GB modules for a 32GB dual-channel pool to consolidate light workloads, or populate six to eight modules (48–64GB) to comfortably run denser VM sets while keeping per-core memory ample.

In-Memory Database
In-memory platforms like Redis demand reliability. Use a minimum of two of these 8GB ECC UDIMMs per socket for dual-channel bandwidth and 16GB of fault-tolerant cache. For larger datasets, scale to four or eight modules, delivering 64GB of protected storage that prevents silent data corruption in real-time transactional workloads.

High-Performance Computing
HPC nodes benefit from the 1866MHz speed and CL13 latency to feed multi-core CPUs efficiently. Equip each compute node with six to eight modules to reach 48–64GB of error-correcting memory. The ECC protection guards numerical results across long simulation runs, avoiding memory-related silent errors that compromise scientific output.

Verified Compatibility

Rigorously tested for server compatibility: compatible with Dell PowerEdge T20, HP ProLiant ML310e Gen8, Lenovo ThinkServer TS140.

FAQ