General

Engineer's Note

The M393B2873FH0-CH9 is a 1GB DDR3-1333 registered ECC RDIMM (single-rank x8, CAS 9) explicitly designed for server platforms running virtualization, in-memory databases, and other data-critical workloads. Its registered signal topology stabilizes command and address lines under high-density configurations while integrated ECC delivers real-time error correction, safeguarding data integrity in mission-critical 24/7 environments.

Technical Specs & Insights

1. ECC protection corrects single-bit errors in real time, safeguarding financial transactions and database integrity against silent data corruption in always-on server environments.
2. Registered buffering decouples the command and address buses from the memory controller, enabling scalable high-capacity configurations without signal compromise for dense virtualization clusters.
3. A sustained throughput of 10.6 GB/s per channel ensures smooth data streaming to multiple guest machines concurrently, preventing I/O bottlenecks during peak enterprise workloads.
4. Single-rank architecture draws lower current per DIMM, reducing overall rack power consumption and thermal stress in blade servers while preserving compute density.
5. CAS latency of nine cycles shortens the access time to active pages, directly improving query responsiveness for latency-sensitive online transaction processing systems.

Why These Specs Matter

In server environments, the Samsung M393B2873FH0-CH9 RDIMM directly addresses the critical pressures you face when every transaction counts. Its ECC technology is not just a specification; it actively corrects single-bit memory errors caused by cosmic radiation or electrical noise, preventing silent data corruption that could crash a virtualized cluster or poison a financial database. Coupled with the Registered buffer, this module allows your hypervisor to manage significantly larger memory populations across multiple DIMM slots without sacrificing electrical stability, which is essential when you are consolidating dozens of VMs onto a single host.

For in-memory databases like Redis or SAP HANA, the Single Rank x8 organization and 1333MHz speed with CL9 latency become a tangible competitive advantage. Single Rank architecture typically yields tighter command timing and lower access latency compared to dual-rank configurations, meaning your real-time analytics queries complete milliseconds faster, directly improving user-facing response times under heavy concurrent loads. When a node in your virtualization cluster fails due to a non-ECC module, the cost of failover and data rebuild far outstrips any upfront hardware savings. This module keeps your critical services available and your data accurate, delivering the deterministic reliability your infrastructure demands.

Endurance & Reliability

Capacity Planning Guide for Server Deployments

The Samsung M393B2873FH0-CH9 is a 1GB DDR3-1333 Registered ECC RDIMM, designed exclusively for server-class platforms. Its modest per-module capacity demands careful planning—systems must rely on dense module populations to meet modern memory requirements. Below are guidelines for three typical server workloads.

General Virtualization
Hypervisors benefit from ample RAM to host multiple VMs efficiently. With 1GB sticks, aim to populate all available memory channels symmetrically to maximize bandwidth and interleaving. For light workloads (10–15 small VMs), a configuration of 24–32 modules (24–32 GB) across the server’s DIMM slots provides sufficient headroom. Always prioritize balanced population across CPU sockets to maintain NUMA locality and predictable performance.

In-Memory Database
In-memory databases (e.g., Redis, SAP HANA) require extremely large, low-latency memory pools. Using 1GB modules, you would need 64–128 modules just to reach 64–128 GB—a capacity that is marginal for production datasets. For small test instances, fill every slot with these RDIMMs, but for real deployments, plan to replace them with higher-density registered DIMMs. If you must use these modules, organize them in a multi-rank channel arrangement to mitigate the performance impact of the high module count.

High-Performance Computing
HPC clusters value bandwidth over sheer capacity for many parallel jobs. Deploy 16–24 modules (16–24 GB per node) populating all memory channels to deliver the peak 1333 MT/s data rate. Registered ECC ensures calculation integrity during extended runs. For memory-bound simulations, this setup provides a balanced power envelope while the full channel population maximizes aggregate throughput. Consider this configuration for tightly coupled, MPI-based applications where an individual node’s capacity is adequate.

Verified Compatibility

Rigorously tested server memory, compatible with Dell PowerEdge R710, R720, HP ProLiant DL380p Gen8, and IBM System x3650 M3.

FAQ