General

Engineer's Note

Designed for enterprise servers and high-density virtualization platforms, this Samsung M393B1K70CH0-YH904 8GB DDR3-1333 RDIMM leverages Registered signal technology and ECC to ensure data integrity under heavy in-memory database and multi-VM workloads. Its dual-rank x4 organization and CL9 latency strike a balance between channel utilization and responsiveness, making it ideal for sustained throughput in legacy rack and tower server deployments.

Technical Specs & Insights

1. ECC protection detects and silently corrects single-bit memory errors, preventing silent data corruption in mission-critical enterprise applications and hypervisor-managed virtual machine environments.
2. Registered signal topology buffers the command and address buses, preserving signal integrity when populating high-density DIMM slots across multi-socket server platforms.
3. Dual Rank x4 organization enables rank interleaving that fully saturates memory channels, delivering predictable throughput under heavy virtualized consolidation and in-memory database loads.
4. Low 1.35V operation cuts overall server power envelope and thermal output, directly lowering cooling costs and improving energy efficiency in dense rack deployments.
5. 1333 MT/s data rate offers a balanced bandwidth ceiling well-suited for legacy enterprise workloads, sustaining smooth I/O response for database transactions and mid-scale web services.

Why These Specs Matter

The Samsung M393B1K70CH0-YH904 is a server-class 8GB DDR3 Registered DIMM, purpose-built for environments where downtime is not an option. Its four defining characteristics directly address the real pain points of IT infrastructure: uncorrected data errors, memory controller overload under heavy population, latency spikes during parallel access, and runaway energy costs.

At the heart of this module, ECC technology continuously detects and corrects single-bit flips caused by background radiation. In a virtualized cluster hosting dozens of production VMs, a silent bit-flip in guest memory can corrupt a database transaction or kernel data structure, leading to unexplained crashes that take hours to diagnose. ECC transforms these invisible threats into instantly corrected events, safeguarding business continuity. The registered buffer decouples the memory chips from the CPU’s command and address bus, reducing electrical loading. For a server packed with 24 DIMM slots running an in-memory database like SAP HANA, this means stability at full capacity instead of signal degradation and boot failures. The dual-rank x4 organization leverages internal bank interleaving so that while one rank is busy writing, the other can start a read. This parallelism delivers higher sustained bandwidth under the randomized access patterns of real-time analytics, ensuring your Redis queries return in microseconds, not milliseconds. Finally, operating at 1.35V instead of the standard 1.5V reduces power draw by roughly 20 percent per module. Across a full rack of servers, this not only cuts your electricity bill but also lowers exhaust temperatures, allowing denser deployment and extending the service life of nearby voltage regulators. Together, these features mean this memory does not just store data—it preserves the integrity, speed, and efficiency of your entire server platform when you need it most.

Endurance & Reliability

General Virtualization
For dense virtualization hosts, populate all memory channels evenly to maximize bandwidth. Deploy six or eight of these 8 GB dual-rank RDIMMs per CPU (48–64 GB total) in a balanced configuration, leaving headroom for moderate overcommitment without swapping.

In-Memory Database
In-memory databases demand large, low-latency capacity with absolute data integrity. Fully populate each memory channel using 16 or more modules to reach 128 GB and beyond, leveraging ECC and registered buffering to maintain signal stability under heavy, sustained loads.

HPC
Achieve peak memory throughput by installing one module per channel in a symmetric layout—typically eight modules per node for 64 GB. The 1.35 V low-power operation reduces thermal stress in dense clusters, while dual-rank x4 organization and CL9 latency deliver the predictable bandwidth essential for parallel scientific workloads.

Verified Compatibility

This RDIMM is rigorously tested for Dell PowerEdge R720, HP ProLiant DL380p Gen8, IBM x3650 M4 and other servers.

FAQ