General

Engineer's Note

This is a server-class DDR3L Registered ECC module with a low voltage of 1.35V, ideal for virtualization platforms and in-memory databases where data integrity and power efficiency are critical. Its dual-rank x8 configuration and ECC support enhance memory bandwidth and correct single-bit errors, ensuring stable operation under sustained heavy loads.

Technical Specs & Insights

1. ECC memory actively detects and corrects single-bit errors, preventing silent data corruption in financial transaction logs and critical database operations.
2. Registered signal buffering decouples the memory controller from the DRAM load, enabling large-capacity configurations that keep dense virtualization clusters stable under sustained access.
3. Dual Rank x8 organization interleaves accesses across two internal rank groups, amplifying effective bandwidth for concurrent virtual machine execution without adding latency spikes.
4. 1.35V low-voltage operation trims overall server power draw and waste heat, directly lowering cooling overhead in multi-node rack deployments.
5. 1333 MHz clock speed yields a peak transfer rate of 10.6 GB/s per channel, a sweet spot for entry-level enterprise workloads where throughput and cost must balance.

Why These Specs Matter

The Samsung M393B5273EB0-YH9 is a registered DDR3 server DIMM purpose-built for enterprise environments. Four critical features address real-world challenges. First, ECC error correction safeguards virtualization clusters. A single bit flip can corrupt the hypervisor and crash every hosted VM; ECC automatically corrects these errors, preserving uptime. Second, the registered buffer re-drives command and address signals, enabling you to populate all memory slots without signal degradation. This stable scaling is essential for dense VM hosts requiring large memory footprints. Third, operating at 1.35V, it lowers power and cooling costs versus 1.5V DDR3, generating substantial savings in a fully populated rack. Fourth, the dual-rank x8 organization employs interleaving to maximize bandwidth. For in-memory databases like Redis, this architecture accelerates concurrent accesses, ensuring fast query responses during peak transaction loads. Ultimately, these specifications mean your critical applications stay online, efficient, and responsive around the clock.

Endurance & Reliability

Server Memory Identified: The M393B5273EB0-YH9 is a DDR3-1333 Registered ECC RDIMM (4GB, Dual Rank, 1.35V). Capacity planning must leverage ECC reliability and registered signal integrity for sustained enterprise workloads.

General Virtualization
Populate all memory channels equally to maximize bandwidth per socket—typically six or eight modules for balanced NUMA configurations. Target 128–256GB total by installing 4GB DIMMs across channels, leaving spare slots for future density growth while ensuring alignment with hypervisor memory overcommit ratios.

In-Memory Database
Favor maximum capacity over speed; fully load all DIMM slots with identical 4GB RDIMMs to reach the platform’s ceiling (e.g., 384GB on dual-socket servers). A large single-ranked pool avoids swap latency, but if dual-rank 4GB sticks are the only option, prioritize capacity per channel and validate NUMA interleaving for consistent low-latency access.

High-Performance Computing
Configure symmetrical memory channels per CPU, matching one 4GB DIMM per channel to deliver peak theoretical bandwidth. In memory-bandwidth-bound HPC codes, the dual-rank x8 design gives a slight concurrency benefit; avoid mixing ranks or speeds, and maintain 1333MHz at 1.35V for power-efficient node scaling.

Verified Compatibility

Rigorously tested for compatibility with Dell PowerEdge R720, HP DL380p Gen8, and Lenovo System x3650 M4.

FAQ