General

Engineer's Note

Ideal for legacy server platforms running virtualization or memory-intensive databases, this 4GB DDR3-1333 Registered ECC module ensures data integrity in 24/7 environments. Its dual-rank organization and registered signal buffering provide enhanced electrical stability on high-capacity memory channels, allowing reliable operation across multiple DIMMs per channel in dual-socket configurations.

Technical Specs & Insights

1. RDIMM architecture with registered clock drivers maintains signal integrity across fully loaded server memory channels, ensuring consistent performance even in multi-socket platforms handling mission-critical workloads.
2. ECC protection silently corrects single-bit memory errors, safeguarding transactional databases and financial processing from silent data corruption that could compromise business integrity.
3. Registered command and address buffering stabilizes high-capacity configurations, allowing IT to provision more virtual machines per physical host without risking memory bus instability.
4. Economical base capacity strikes an optimal balance for scale-out cloud nodes and lightweight hypervisor duties, minimizing cost-per-virtual-machine while running essential services reliably.
5. Dual-rank organization interleaves memory access across internal banks, maximizing channel bandwidth utilization to deliver predictable throughput under heavy virtualization consolidation.

Why These Specs Matter

The Samsung M393B5170FH0 is a server-grade DDR3 RDIMM engineered for reliability in mission-critical environments. Its ECC technology continuously detects and corrects single-bit memory errors, preventing silent data corruption that could crash a virtualized host running dozens of VMs or corrupt transactions in an in-memory database like Redis. The registered signal architecture buffers command and address lines, enabling a server to populate all 24 DIMM slots without signal degradation, which is essential for maintaining stability when scaling up to support heavy SQL Server workloads. Moreover, the dual-rank design interleaves internal memory banks to boost effective bandwidth under concurrent access across multiple virtual machines, reducing latency spikes during peak loads. Operating at a standard 1.5V DDR3-1333, this module delivers 10.6 GB/s throughput with CL9 latency, ensuring consistent performance for database indexing and high-speed caching platforms where every microsecond counts. These features transform the M393B5170FH0 into a dependable foundation for virtualization clusters and always-on enterprise databases.

Endurance & Reliability

General Virtualization
Populate at least two 4GB RDIMMs per memory channel to obtain 8GB per channel, balancing capacity and interleaving benefits for multiple virtual machines. A dual-socket server with six channels reaches 48GB using twelve modules, which supports a moderate number of light workloads. Always distribute identical DIMMs symmetrically across all channels to sustain consistent performance.

In-Memory Database
Ensure the entire dataset stays resident by filling every available DIMM slot with these 4GB registered modules. A dual-socket platform with quad-channel architecture and three DIMMs per channel accommodates 24 modules, delivering 96GB of ECC-protected capacity. Maintain identical population order across sockets to preserve NUMA symmetry and uniformly low latency for high-throughput in-memory operations.

High-Performance Computing
For maximum bandwidth, install a single dual-rank 4GB RDIMM per channel, allowing the memory controller to run at the full DDR3-1333 speed without rank-related timing penalties. An eight-channel configuration yields 32GB of low-latency capacity, ideal for bandwidth-sensitive HPC codes. If the workload demands larger capacity, add a second DIMM per channel and accept a slight frequency reduction to DDR3-1066 while maintaining balanced population.

Verified Compatibility

Rigorously tested server RAM, compatible with Dell R710, HP DL380 G7, IBM x3650 M3.

FAQ