General

Engineer's Note

This Samsung M393A2K40BB0-CPB00 is a 16GB DDR4-2133 registered DIMM with ECC, purpose-built for server platforms where data integrity is crucial in virtualization clusters and in-memory databases. Its single-rank x4 organization reduces bus loading and improves signal integrity, enabling stable CL15 operation across fully populated memory channels in dense rack deployments.

Technical Specs & Insights

1. ECC memory correction eliminates silent data corruption, preserving the integrity of virtualized workloads in multi-tenant data centers.
2. Registered DIMM buffering amplifies per-channel module support, allowing infrastructure to scale memory capacity without compromising signal integrity.
3. Ample per-module capacity maximizes server memory density, enabling more virtual machines per host and streamlining resource consolidation.
4. Single-rank architecture paired with x4 device width reduces electrical contention and enhances error detection, essential for maintaining uptime in storage-intensive applications.
5. Optimized CAS latency expedites critical data requests, boosting the responsiveness of large-scale database operations during peak hours.

Why These Specs Matter

The Samsung M393A2K40BB0-CPB00 is a server-class RDIMM purpose-built for mission-critical enterprise workloads where uptime and data fidelity are non-negotiable. Its four defining characteristics directly translate into tangible operational resilience. First, integrated ECC technology actively detects and corrects single-bit memory errors in real time; in a virtualized cluster running dozens of VMs, this prevents silent data corruption that could crash a hypervisor or poison a financial transaction in an in-memory database like Redis. Second, the registered signal type buffers command and address lines, stabilizing electrical load when all 24 slots in a dual-socket rack server are populated — meaning you can scale capacity to 384 GB without sacrificing signal integrity or suffering random kernel panics. Third, the single-rank x4 organization optimizes the memory controller’s ability to interleave requests, delivering the low access latency and consistent bandwidth that real-time analytics and OLTP databases demand; a single DIMM handles massive I/O without the rank-switching overhead that erodes query throughput. Fourth, the strict 1.2 V operating voltage dramatically reduces thermal output across dense server farms, lowering cooling expenditures in colocation facilities. For a virtualization host or an in-memory database engine, this module keeps data accurate, latency predictable, and operating costs firmly controlled.

Endurance & Reliability

Capacity Planning

The M393A2K40BB0-CPB00 is a server-grade 16GB DDR4-2133 RDIMM. Tailor configurations to workload demands.

General Virtualization
Populate all memory channels identically, ideally one 16GB DIMM per channel (e.g., 8 DIMMs in a dual-socket server with 8 channels) to achieve 128GB total while maintaining full 2133MHz speed. This configuration provides enough capacity for dozens of VMs and ensures consistent performance via uniform memory access.

In-Memory Database
In-memory databases prioritize capacity and data integrity. Use the maximum supported DIMMs per channel while accepting a slight speed reduction. For instance, populating two DIMMs per channel (2DPC) with 16GB modules can deliver 256GB or more per host, enabling large dataset caching. ECC protection is critical for preventing in-memory data corruption.

High Performance Computing (HPC)
HPC workloads demand maximum memory bandwidth. Install exactly one DIMM per channel (1DPC) across all populated channels to sustain the full 2133MHz speed. In a dual-socket platform with 8 channels per CPU, installing 16 DIMMs yields 256GB of high-bandwidth capacity for parallel workloads.

Verified Compatibility

Rigorously tested server RDIMM, compatible with Dell PowerEdge R730, HPE ProLiant DL380 Gen9, and Lenovo System x3650 M5.

FAQ