General

Engineer's Note

Designed for server platforms, the M393A1K43BB0-CTD is an 8GB DDR4-2666 Registered DIMM with ECC, delivering the data integrity and reliability essential for virtualization and in-memory database workloads. Its single-rank x8 organization and CL19 latency ensure stable signal integrity and efficient memory controller loading in dense 288-pin configurations.

Technical Specs & Insights

1. With end-to-end ECC, silent data corruption is prevented in-memory, a must for transactional databases and long-running analytics where bit-flip errors could otherwise cascade into costly data integrity issues.
2. The registered clock driver re-drives address and command signals, enabling large memory populations across multiple DIMM slots per channel without signal degradation, essential for high-capacity virtualized servers.
3. A 2666MT/s throughput per DIMM keeps pace with modern Xeon processors, mitigating memory bandwidth bottlenecks when running concurrent latency-sensitive microservices or dense containerized workloads.
4. A 1.2V DRAM supply voltage cuts thermal footprint significantly, allowing dense 24-DIMM servers to run cooler and sustain lower fan speeds, which directly reduces OPEX in hyperscale data centers.
5. The single-rank x8 organization balances latency and power draw, ensuring stable operation at the rated speed even when all memory channels are fully loaded, preserving performance in heavily provisioned server nodes.

Why These Specs Matter

The Samsung M393A1K43BB0-CTD is an 8GB DDR4-2666 RDIMM purpose-built for enterprise servers, delivering four capabilities that directly resolve real-world data center pain points. First, ECC memory automatically corrects single-bit errors caused by background radiation. In a virtualized cluster hosting dozens of VMs, a silent bit flip could crash a critical financial database or corrupt a live migration; ECC eliminates that risk, preserving end-to-end data integrity for your hypervisor. Second, the Registered signal type stabilizes command and address lines when populating multiple DIMMs per channel. For an in-memory database like Redis handling millions of transactions, this lets you scale memory capacity reliably without signal degradation, so high throughput remains consistent. Third, the 2666MT/s speed with Single Rank x8 organization provides 21.3GB/s bandwidth, accelerating virtual machine snapshots and memory-intensive analytics on large datasets. Finally, operating at just 1.2V dramatically reduces power consumption compared to legacy generations. In a dense data center, lower voltage means less heat and reduced cooling costs, directly improving operational efficiency and long-term reliability for your 24/7 services.

Endurance & Reliability

Capacity Planning Guide for Samsung M393A1K43BB0-CTD (8GB DDR4-2666 ECC RDIMM)

Based on the ECC Registered DIMM specification, this module is designed for server-class systems. The following scenarios illustrate optimal configuration strategies using this 8GB single-rank RDIMM.

General Virtualization
Populate memory channels symmetrically to balance cost and capacity. For a typical dual-socket server with six channels per CPU, install one module per channel (12 x 8GB) to achieve 96GB total while maintaining maximum memory speed. This provides ample headroom for mixed virtual machines and allows future expansion by adding second DIMMs to each channel.

In-Memory Database
Maximize total capacity by fully populating all channels with two DIMMs per channel (2DPC), accepting a slight speed reduction for larger datasets. In a 16-slot server, deploy 16 identical modules for a 128GB footprint. Use identical single-rank DIMMs to maintain error-free operation and consistent latency, which is critical for real-time analytics and in-memory caching platforms.

High-Performance Computing
Prioritize memory bandwidth with one DIMM per channel (1DPC) configuration. In a multi-node cluster, outfit each node with at least 12 modules (one per channel) for a balanced 96GB capacity running at full 2666MT/s. This setup minimizes access latency and maximizes throughput for tightly coupled parallel workloads like computational fluid dynamics or molecular modeling.

Verified Compatibility

Rigorously tested for server compatibility, including Dell PowerEdge R760, HPE ProLiant DL380 Gen10, and Lenovo ThinkSystem SR630.

FAQ