General

Engineer's Note

This Samsung M393A2G40DB0-CPB-C is a server-grade DDR4-2133 Registered DIMM with ECC, purpose-built for enterprise platforms running virtualization, in-memory databases, and mission-critical workloads where data integrity is non-negotiable. Its dual-rank x4 organization and CL15 latency optimize memory bandwidth and bank-level parallelism, while the registered signal type ensures robust signal integrity in high-density 288-pin configurations, making it ideal for consistent, error-free operation under sustained load.

Technical Specs & Insights

1. ECC protection detects and corrects single-bit memory errors in real time, preventing silent data corruption that could crash critical financial or database workloads.
2. Registered signal buffering stabilizes high-density memory configurations, allowing servers to scale to hundreds of gigabytes without compromising command integrity.
3. Dual Rank x4 organization interleaves memory accesses across banks, sustaining peak bandwidth utilization for virtualization hosts running dozens of concurrent VMs.
4. 16 GB per module delivers the ideal capacity granularity for dense datacenter deployments, maximizing total memory per node without overprovisioning cost.
5. 1.2 V low-power operation cuts per-DIMM energy consumption significantly, directly lowering cooling overhead in multi-rack server environments.

Why These Specs Matter

The M393A2G40DB0-CPB-C is a 16GB DDR4-2133 Registered DIMM built for enterprise servers. Its four defining traits—ECC error correction, registered buffer, dual-rank x4 architecture, and 1.2V operation—directly address critical pain points. In virtualization farms, ECC silently fixes single-bit flips caused by background radiation; without it, a corrupted bit in a hypervisor page or guest kernel can trigger system crashes or silent data corruption. The registered buffer re-drives address and command signals, letting you populate all 24 DIMM slots on a dual-socket host with stable, high-capacity memory—essential for consolidating hundreds of virtual machines. The dual-rank design interleaves data across two sets of DRAM pages, raising sustained bandwidth for in-memory databases like SAP HANA or Redis. When handling high-throughput transactions, this boosts query-per-second rates and cuts tail latency. Finally, 1.2V operation slashes energy consumption by roughly 20%, trimming power and cooling bills at scale. This directly yields higher uptime, responsive applications, and lower TCO.

Endurance & Reliability

General Virtualization
For a balanced virtualized environment hosting 20–30 VMs, populate two 16 GB RDIMMs per channel for a total of 64 GB across four channels (4 x 16 GB). This dual-rank, registered ECC configuration ensures reliable memory isolation and sufficient capacity for hypervisor overhead plus moderate workloads. Use identical modules to maintain NUMA node symmetry in dual-socket servers.

In-Memory Database
Deploy a fully populated memory architecture using 8 x 16 GB modules (128 GB total) to maximise capacity and bandwidth for datasets exceeding 100 GB. The DDR4-2133 RDIMMs with ECC guard against bit errors during high-speed transactional processing. Evenly distribute modules across all memory channels to sustain the low-latency throughput required by Redis or SAP HANA instances.

High-Performance Computing
Optimise for bandwidth-sensitive parallel workloads by installing 8 or 16 identical 16 GB RDIMMs (128–256 GB) in a balanced, all-channel interleaved layout. The dual-rank, registered design delivers stable memory bandwidth under sustained floating-point loads. Pair with a CPU supporting multiple DDR4 channels to avoid bottlenecks in CFD, molecular dynamics, or seismic processing tasks.

Verified Compatibility

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

FAQ