General

Engineer's Note

Designed as a registered ECC DDR4 module, this 32 GB RDIMM is purpose-built for enterprise server environments demanding uncompromising data integrity. Its dual-rank x4 organization and CL17 latency deliver balanced throughput ideal for memory-intensive virtualization and in-memory database workloads, while the registered signal architecture ensures stable operation across densely populated 288-pin platforms.

Technical Specs & Insights

1. ECC error correction silently detects and fixes single-bit memory faults, preserving transactional integrity and uptime in mission-critical enterprise servers.
2. Registered buffering fortifies signal stability across high-density DIMM populations, making large-scale virtualization and memory scaling feasible.
3. Dual Rank x4 organization sustains channel saturation through interleaving, delivering consistent low-latency throughput for heavily consolidated virtual machines.
4. Generous per-module capacity raises the total memory ceiling of server nodes, enabling dense database collocation and broader container orchestration.
5. The rated transfer speed supplies ample main-memory bandwidth to feed contemporary multi-core server CPUs, preventing data-starve in real-time analytics workloads.

Why These Specs Matter

The Samsung M393A4K40CB1-CRC0Y is engineered as a registered server DIMM, and its four defining characteristics translate directly into mission-critical reliability for data center workloads. First, the ECC technology continuously detects and corrects single-bit memory errors caused by cosmic radiation or electrical noise. In a virtualization cluster hosting dozens of VMs, an undetected bit flip could silently corrupt a financial transaction or hypervisor state; ECC eliminates that existential risk. Second, the registered signal type buffers command and address lines, allowing a single server board to support multiple high-capacity modules without signal degradation. When you load a four-socket box with 32 GB RDIMMs for a large in-memory database like SAP HANA, the register ensures clean signaling under heavy rank counts. Third, the dual-rank x4 organization boosts bandwidth through rank interleaving, enabling the memory controller to pipeline reads and writes across ranks—this directly accelerates in-memory analytics queries where every nanosecond of data access counts. Finally, operating at a cool 1.2 V, this DDR4 module reduces thermal load inside dense rackmount servers, lowering both cooling costs and long-term power bills while preserving stability across always-on platforms.

Endurance & Reliability

General Virtualization
For general virtualization hosts, populate memory channels symmetrically to maximize memory bandwidth. A balanced configuration using six or eight identical 32GB RDIMMs per socket enables smooth consolidation of dozens of moderate VMs, while leaving DIMM slots available for future growth. Avoid mixing ranks or capacities across channels to maintain predictable NUMA performance.

In-Memory Database
In-memory databases demand low latency and high capacity without swapping. Deploy this 32GB dual-rank x4 RDIMM across all available channels—aiming for at least 256GB per socket—to keep entire datasets resident in RAM. The ECC and registered design ensure data integrity, which is critical when journaling or replicating transactional workloads.

High-Performance Computing (HPC)
HPC applications thrive on bandwidth-sensitive, large-footprint memory configurations. Populate one DIMM per channel using these registered 32GB modules to balance capacity and the peak 2400 MT/s speed. For CFD or molecular dynamics codes that scale with memory bandwidth, prioritize fully populating memory controllers before adding extra ranks, as dual-rank x4 modules already provide an optimal rank interleaving benefit without exceeding electrical loading limits.

Verified Compatibility

Rigorously tested server memory: compatible with Dell PowerEdge R740, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650.

FAQ