Samsung M393B1K70CH0-CH909 8GB DDR3 RDIMM 1333MHz | Reliable ECC

General

Engineer's Note

The M393B1K70CH0-CH909 is a DDR3-1333 Registered ECC memory module purpose-built for server platforms, ideally suited for virtualization, in-memory databases, and mission-critical workloads where data integrity is paramount. Its dual-rank x4 organization and registered signal architecture enable stable operation at higher memory densities, while ECC and a CAS latency of 9 ensure reliable error correction and predictable access latency under sustained load.

Technical Specs & Insights

1. Registered signal type buffers command and address lines to preserve signal integrity across dense server memory banks, enabling rock-solid stability in fully loaded rack configurations.
2. ECC protection actively corrects single-bit errors in real time, eliminating silent data corruption risks for financial transactions and database operations that demand absolute accuracy.
3. Dual Rank x4 organization interleaves memory accesses between two internal ranks, significantly boosting bandwidth to keep latency-sensitive virtual machines responsive under heavy consolidation.
4. The 8GB capacity per module supplies the core memory footprint needed to scale virtualization hosts, packing more guest instances per server before hitting density limits.
5. DDR3-1333 speed delivers consistent 10.6 GB/s throughput, striking an efficient balance between data transfer rates and thermal restraint for always-on enterprise workloads.

Why These Specs Matter

The Samsung M393B1K70CH0-CH909 is an 8GB DDR3-1333 RDIMM built for server environments where reliability and uptime are non-negotiable, and its four defining characteristics directly translate into real-world resilience. The registered signal type means an onboard register buffers the command and address lines, dramatically reducing the electrical load on the memory controller. For a virtualization cluster running dozens of VMs, this ensures stable operation even when all DIMM slots are populated, directly preventing memory-related system crashes that would otherwise cascade into multi-tenant outages. Its ECC capability adds a more critical layer by detecting and correcting single-bit errors that naturally occur due to cosmic radiation or electrical noise. In an in-memory database, a flipped bit can silently corrupt financial transactions or customer records; ECC turns a potential data integrity disaster into an automatically healed event, preserving trust and avoiding costly forensic recovery. The dual-rank x4 organization interleaves access across two independent sets of memory chips on the same module, boosting sustained bandwidth under heavy concurrent loads. When multiple database queries run in parallel, this interleaving reduces latency and raises throughput, letting your analytics finish faster without a hardware refresh. Even the 1.5V operating voltage, typical for DDR3, reduces thermal stress in dense rack configurations, helping the DIMM maintain consistent timing across long uptime cycles. Simply put, this module translates into fewer silent data errors, higher consolidation ratios for your hypervisor, and predictable performance for your most demanding enterprise applications, all while protecting the investment you have already made in your server infrastructure.

Endurance & Reliability

General Virtualization
For general virtualization workloads, balance capacity and channel interleaving to avoid memory bandwidth bottlenecks with DDR3-1333. Populate at least four 8GB RDIMMs (32GB total) evenly across available memory channels—preferably two modules per channel in a dual- or quad-channel server—to enable interleaving and support a moderate number of virtual machines without excessive swapping.

In-Memory Database
In-memory databases like Redis or SAP HANA demand large, reliable memory pools. Maximize capacity by filling all DIMM slots with these 8GB ECC Registered modules (e.g., 12 modules for 96GB or 24 for 192GB on dual-socket systems). The ECC protection is critical for data integrity, and registered signaling ensures stability at high densities, even if speed is limited to 1333MHz.

High Performance Computing
HPC applications are sensitive to memory bandwidth. Install identical 8GB RDIMMs in every memory channel, respecting symmetric population rules (e.g., eight modules in an eight-channel server for 64GB) to achieve the widest possible memory interconnect. Although DDR3-1333 has modest throughput, fully utilizing all channels minimizes latency variation and maximizes aggregate bandwidth for parallel computation.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge R710/R720, HP ProLiant DL380p Gen8, and similar DDR3 servers.

FAQ