General

Engineer's Note

The M393B5270CH0-YH9 is a DDR3 registered ECC memory module purpose-built for server platforms running virtualization, in-memory databases, or other mission-critical workloads that demand uncompromising data integrity. Its single-rank x4 configuration reduces bus loading to enhance signal stability in multi-DIMM setups, while the 1.35V low-voltage operation cuts power consumption without sacrificing its CAS 9 latency at 1333MHz.

Technical Specs & Insights

1. With ECC protection, silent data corruption is virtually eliminated, safeguarding financial transactions and database records in always-on server environments.
2. Registered signal topology allows the memory controller to drive many DIMMs per channel, maximizing total server memory capacity for dense virtualization clusters.
3. The 1.35V operating voltage cuts memory subsystem power draw by roughly 20% compared to 1.5V alternatives, directly lowering TCO for hyperscale data centers.
4. Delivering 1333 MT/s, the module sustains smooth operation of legacy enterprise applications and lightweight containers without becoming an I/O bottleneck.
5. Single-rank x4 design minimizes capacitive loading, allowing more DIMMs per channel in high-density server nodes without compromising signal integrity.

Why These Specs Matter

In the data center, the Samsung M393B5270CH0-YH9 RDIMM defines reliability through four essential characteristics: ECC error correction, Registered buffering, 1.35V low-voltage operation, and a single-rank x4 organization. These are not abstract specs—they directly answer the demands of modern server workloads. Consider a dense virtualization cluster running hundreds of guest VMs. Here, ECC is non-negotiable. It detects and corrects single-bit errors caused by background radiation, preventing silent data corruption that could crash entire hosts and disrupt multi-tenancy. Registered buffering minimizes electrical load on the memory controller, allowing you to populate all DIMM slots without sacrificing signal integrity, which is critical for maximizing VM density. The 1.35V driving voltage dramatically lowers power consumption and thermal output, shrinking the total cost of ownership in always-on environments. In an in-memory database such as Redis serving rapid transactions, the single-rank x4 configuration at 1333MHz with CL9 timing delivers predictable, low-latency access patterns. This ensures that your real-time analytics consistently operate on accurate, uncorrupted data, sustaining the performance integrity your business depends on.

Endurance & Reliability

Capacity Planning Guidelines

This 4 GB DDR3-1333 ECC registered DIMM is server memory. Use the following recommendations to plan module counts per workload.

General Virtualization
Populate all memory channels symmetrically. Install two modules per channel (e.g., 16 × 4 GB = 64 GB on a dual-socket server with eight channels) to comfortably host numerous VMs. For denser consolidation, move to three modules per channel (96 GB total) provided the platform supports triple DIMMs per channel without clock throttling.

In-Memory Database
Maximize capacity by filling every available DIMM slot. A dual-socket host offering 12 slots per CPU yields 24 × 4 GB = 96 GB. The module’s single-rank x4 organization supports full population with stable signal integrity, though if your dataset exceeds 100 GB, consider complementing with higher-density modules.

High-Performance Computing
Prioritize memory bandwidth. Install one module per channel (1DPC) to sustain the full 1333 MHz speed, delivering 32 GB across eight channels. When the working set demands more capacity, populate two modules per channel, accepting a potential frequency drop to 1066 MHz; evaluate your application’s bandwidth sensitivity against the expanded memory footprint.

Verified Compatibility

Rigorously tested, validated for Dell R720, R620, HP DL380p G8, IBM x3650 M4, Cisco UCS C220 M3.

FAQ