General

Engineer's Note

The Samsung M393A2K40DB3-CWE is a 16GB DDR4-3200 Registered ECC memory module ideally suited for enterprise servers and data centers handling virtualization or in-memory databases, where its error-correcting code and registered clock driver ensure unparalleled data integrity and signal stability across fully loaded multi-DIMM channels. The single-rank x4 organization at a low 1.2V operating voltage delivers consistent low-latency performance with CL22 timings, making it a power-efficient choice for dense, mission-critical deployments that demand reliable 24/7 operation.

Technical Specs & Insights

1. ECC protection detects and corrects single-bit errors in real time, safeguarding transactional integrity for mission-critical databases and virtualization workloads.
2. Registered logic buffers clock and command signals, enabling large multi-DIMM server configurations without signal degradation under full load.
3. A balanced module density maximizes server memory scalability, allowing IT architects to hit optimal VM-per-node ratios without overspending on underutilized capacity.
4. High memory bandwidth accelerates parallel data access in cloud-native and analytics applications, shrinking query times when every millisecond counts.
5. Single Rank x4 organization delivers superior bank-level parallelism and robust ECC granularity, keeping latency low in latency-sensitive services like in-memory caching.

Why These Specs Matter

When you rely on a server to run a virtualized cluster or an in-memory database, memory errors aren’t just a nuisance—they’re a direct threat to business continuity. The Samsung M393A2K40DB3-CWE is built precisely for these high-stakes environments. As a DDR4-3200 Registered DIMM with ECC, it tackles the two most critical pain points in the data center: silent data corruption and signal integrity at scale. The ECC engine continuously detects and corrects single-bit flips caused by cosmic radiation or electrical noise. In a dense virtualization host running dozens of VMs, one undetected bit error can crash a guest, corrupt a transaction log, or silently poison a dataset. That risk is simply unacceptable, and this module makes it mathematically irrelevant. Meanwhile, the Registered buffer stabilizes command and address signals, allowing you to populate all memory channels with confidence—essential when scaling up to hundreds of gigabytes for memory-hungry applications like SAP HANA or Redis clusters. The single-rank x4 organization at CL22 strikes a deliberate balance between bank-level parallelism and latency, delivering consistent 25.6 GB/s bandwidth without compromising the predictable access times that real-time analytics demand. For your virtualized infrastructure or transactional database, this isn’t a commodity part; it’s an insurance policy that preserves uptime, consistency, and the trust your applications depend on.

Endurance & Reliability

Based on the specifications — Registered DIMM with ECC, 288-pin, 1.2V, and Single Rank x4 — this is server memory, designed for stability and reliability in enterprise environments. Below is the capacity planning guide for three typical server workloads.

General Virtualization
For consolidated virtualization hosts running multiple VMs, total memory capacity is often the bottleneck. Deploy at least 16 modules across dual-socket systems (8 DIMMs per CPU, one per channel) to achieve 256 GB, balancing density with memory bandwidth. Populating all channels evenly with these 16 GB RDIMMs ensures optimal interleaving and avoids NUMA penalties.

In-Memory Database
In-memory databases like Redis or SAP HANA demand extremely low latency and high capacity. Use the maximum supported DIMM slots per socket — typically 16 or 24 — with these 16 GB modules for a total of 256–384 GB per server, enabling full dataset caching. Favor a balanced configuration across all memory channels to sustain the high throughput required for real-time analytics.

High Performance Computing
HPC workloads thrive on memory bandwidth rather than sheer capacity. Install the minimum number of modules per CPU needed to populate all memory channels — one 16 GB DIMM per channel (e.g., 8 modules on an 8-channel platform) for a total of 128 GB. This single-rank x4 configuration maximizes frequency headroom and keeps latency low, critical for tightly coupled parallel simulations.

Verified Compatibility

Validated server memory compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen11, Lenovo ThinkSystem SR650 V3, and more.

FAQ