General

Engineer's Note

This DDR3L-1333 Registered ECC memory module is engineered specifically for server platforms and excels in virtualization hosts, in-memory databases, and mission-critical workloads where data integrity is paramount. Its dual-rank x4 configuration leverages registered signaling to maintain clean signal integrity in high-density deployments, while the 1.35V low-power operation and ECC correction work together to deliver reliable, energy-efficient performance with CL9 access latency.

Technical Specs & Insights

1. ECC protection actively detects and corrects single-bit memory errors, preserving data integrity in mission-critical server workloads where even silent corruption is unacceptable.
2. Registered signal type buffers command and address lines, allowing the server to scale to higher memory capacities and maintain rock-solid stability across fully populated DIMM slots.
3. Dual Rank x4 organization maximizes channel utilization by interleaving accesses across two ranks, which sustains bandwidth under heavy virtualization and database consolidation.
4. 1.35V low-voltage operation reduces thermal load inside dense rack servers, lowering cooling costs while still delivering reliable DDR3 performance around the clock.
5. 1333MHz speed provides a balanced throughput ceiling for entry-level and mid-range servers, ensuring steady data flow for file services, web hosting, and light containerized applications.

Why These Specs Matter

Based on the 240-pin RDIMM form factor, ECC, and Registered signal type, this Samsung M393B1K70CH0-YH905 is unequivocally a server-grade memory module. For IT architects and data center operators, its four defining characteristics translate directly into tangible business resilience, not just technical specifications.

First, the 1.35V low-voltage DDR3 design directly combats rising energy costs in dense virtualization clusters; every watt saved at the DIMM level multiplies across hundreds of nodes, lowering both electricity bills and cooling overhead while maintaining 1333MHz throughput. Second, the Registered buffer stabilizes signal integrity when populating all memory channels—critical for large-memory Hyper-V or ESXi hosts where you cannot afford boot failures due to electrical loading. Third, ECC error correction silently intercepts single-bit flips caused by cosmic radiation or aging silicon, meaning a financial database in an in-memory analytics platform won’t suffer silent data corruption during a critical overnight batch run. Finally, the Dual Rank x4 organization at CL9 latency optimizes bank-level parallelism, preventing the bandwidth stalls that cripple real-time query performance when multiple virtual machines compete for memory access. In a production SAP HANA instance or a Redis cluster serving millions of transactions, these features form the difference between consistent low-latency service and a troubleshooting nightmare at 3 a.m.

Endurance & Reliability

The M393B1K70CH0-YH905 is a server-class DDR3 8GB RDIMM with ECC and 1.35V low voltage, designed for registered memory platforms. Capacity planning guidance for typical server workloads follows.

General Virtualization
Populate all memory channels identically to maximize bandwidth and support consolidated VMs. For a dual-socket platform with four channels per CPU, install at least eight 8GB modules (64GB total) to handle moderate VM density. Scale to sixteen modules (128GB) by fully populating two DIMMs per channel while monitoring potential speed drops, ensuring balanced resource allocation across virtual machines.

In-Memory Database
Capacity and data integrity are paramount. Use identical dual-rank 8GB RDIMMs to maintain signal quality and enable ECC protection. A fully loaded 16-module configuration (128GB) keeps large datasets resident in RAM and minimizes swap latency. Always check the server’s memory reference matrix to confirm the maximum supported speed when all slots are populated, as load reduction may drop frequency to 1066MHz.

High Performance Computing
Prioritize memory bandwidth and low latency. Install one 8GB RDIMM per memory channel to sustain the full 1333MHz speed at CL9 without imposing extra electrical loading. A dual-socket node with eight channels achieves 64GB of high-bandwidth capacity, ideal for throughput-sensitive simulations. Only add a second DIMM per channel if capacity demands exceed bandwidth benefits, and validate application scaling to avoid performance regression.

Verified Compatibility

Rigorously tested, compatible with servers like Dell PowerEdge R720, R620, HP DL380p Gen8, and Lenovo ThinkServer RD430.

FAQ