General

Engineer's Note

The M391B1G73BH0-YK0 is an 8GB DDR3-1600 ECC Unbuffered DIMM designed for entry-level servers and workstations, where it ensures data integrity for applications like virtualization, memory-resident databases, or archival storage. Operating at a low 1.35V with a dual-rank x8 organization and CL11 latency, this module balances energy efficiency with reliable error correction, making it ideal for 24/7 operation in platforms such as NAS appliances or small business servers that require stability without the cost of registered memory.

Technical Specs & Insights

1. ECC protection silently corrects single-bit errors in real time, preventing silent data corruption in transactional databases and ensuring regulatory compliance for archival integrity.
2. Dual rank x8 organization interleaves memory banks to sustain peak channel utilization, keeping latency low when multiple VMs contend for shared resources.
3. A 1.35V operating voltage significantly cuts power draw per DIMM, directly shrinking the facility power and cooling burden in densely packed rack deployments.
4. Eight gigabytes of capacity per stick provide a sweet spot for entry-level virtualization hosts, allowing sufficient guest memory hosting without exhausting slot real estate.
5. The 1600 MT/s data rate delivers ample bandwidth for concurrent request processing in web and caching servers, avoiding I/O bottlenecks before NVMe storage tiers take over.

Why These Specs Matter

The Samsung M391B1G73BH0-YK0 is an 8GB DDR3 UDIMM built for entry-level servers and workstations. Four features define its real-world value. ECC error correction prevents single-bit memory faults from silently corrupting data—a must when a small business runs its accounting system and virtualized domain controller on one box, where one undetected error leads to catastrophic downtime. Its 1.35V low-voltage design cuts energy draw and heat, slashing cooling costs in always-on deployments like an NVR surveillance server. The dual-rank x8 organization interleaves banks for higher effective bandwidth, keeping performance smooth when a Redis cache handles rapid queries or a light hypervisor runs two VMs. As an unbuffered UDIMM, it avoids the latency of registered modules, delivering quicker command response for single-CPU platforms. This translates into lower energy bills and more predictable performance. For users demanding server-grade integrity with low power and low latency, this module keeps small-scale operations running reliably.

Endurance & Reliability

Based on the 8GB DDR3L-1600 ECC Unbuffered DIMM specifications, this module is server memory. The following capacity planning advice applies to platforms that support ECC UDIMMs.

General Virtualization
Start with 32 GB using four identical M391B1G73BH0-YK0 modules evenly distributed across memory channels. This balanced configuration enables dual-channel interleaving and ECC protection for multiple light to medium virtual machines. When host RAM demand grows, populate the remaining slots with the same part to scale to 64 GB or the board maximum while retaining reliability.

In-Memory Database
Maximize capacity with fully populated DIMM slots. Most single-socket servers accept up to four of these dual-rank 8 GB UDIMMs, giving 32 GB; if the board offers eight slots, aim for 64 GB. Use only identical modules—mixing leads to ECC mismatches. For pure in-memory workloads, prioritize capacity over frequency and validate the configuration with database vendor certification tools.

High Performance Computing
Install one module per channel (typical 1DPC setup) to keep the 1600 MT/s speed stable and latency low. For dual-channel boards, deploy two 8 GB modules for 16 GB; for quad-channel, use four for 32 GB. These dual-rank DIMMs offer sufficient bandwidth per slot. Avoid 2DPC unless peak capacity is mandatory, because speed may drop, impacting tight HPC inter-process communication.

Verified Compatibility

Rigorously tested for server compatibility: Dell PowerEdge T110 II, R220, Lenovo TS140, HP ML10 Gen8.

FAQ