General

Engineer's Note

This is a server-grade DDR4-2933 RDIMM with ECC and registered signaling, making it ideal for virtualization clusters, in-memory databases, and mission-critical enterprise workloads where data integrity and 24/7 uptime are mandatory. Its single-rank x8 configuration and CL21 latency deliver consistent performance and signal stability in dense multi-DIMM server environments, reducing electrical loading for improved memory bandwidth efficiency.

Technical Specs & Insights

1. ECC protection silently corrects single-bit errors, safeguarding transactional databases and virtualized workloads against in-memory data corruption.
2. Registered signal buffering stabilizes command and address lines, enabling dense server configurations with multiple DIMMs per channel without compromising signal integrity.
3. DDR4 technology delivers a balance of throughput and energy efficiency, reducing datacenter cooling demands while sustaining high data rates for in-memory analytics.
4. A transfer rate of 2933 MT/s provides ample memory bandwidth for caching tiers and heavily threaded workloads, accelerating real-time data processing across the server.
5. Single Rank x8 organization minimizes electrical loading, allowing all channels to maintain maximum speed for consistent performance in high-frequency trading or HPC environments.

Why These Specs Matter

The M393A1K43DB1-CVFCQ is an 8GB DDR4-2933 Registered DIMM with ECC, purpose-built for server environments where downtime is not an option and data integrity defines business continuity. In a virtualization cluster running dozens of VMs on a single host, even a single undetected bit flip in a memory page shared by hypervisor structures can corrupt an entire workload chain. The ECC engine on this module automatically detects and corrects single-bit errors in real time, preventing silent data corruption from background radiation or electrical noise before it cascades into an outage. Its Registered architecture adds a buffer that re-drives address and command signals, stabilising the bus when you fully populate all channels across multiple DIMMs per server—critical for dense virtualisation nodes that demand 512 GB or more of total memory without signal collapse. Meanwhile, the 2933 MT/s speed and single-rank x8 organisation deliver low-latency, high-concurrency bandwidth that directly accelerates in-memory databases like Redis or SAP HANA, where every microsecond of response delay amplifies under peak transaction loads. The 1.2 V operating voltage further reduces thermal output in rack-dense deployments, lowering cooling costs while preserving a reliable operating environment over years of 24/7 operation.

Endurance & Reliability

The module is a DDR4-2933 Registered ECC DIMM (RDIMM) with 8GB capacity, designed exclusively for server platforms. Below is capacity planning guidance for three typical workloads.

General Virtualization
Install six to eight of these 8GB RDIMMs per CPU socket, achieving 48–64GB while populating every memory channel. This symmetrical setup leverages registered buffering to maintain signal integrity and maximize bandwidth, delivering predictable performance for a moderate density of virtual machines.

In-Memory Database
Plan for at least sixteen modules (128GB total) equally distributed across all memory channels to handle large, latency-sensitive datasets entirely in RAM. The ECC and registered architecture ensure data integrity and system stability under sustained heavy loads, which is essential for mission-critical in-memory operations.

High-Performance Computing
Adopt a one-DIMM-per-channel strategy—typically eight modules for 64GB on an eight-channel platform—to deliver consistent 2933MT/s bandwidth to every core. This balanced approach exploits the single-rank x8 organization and low 1.2V operation, optimizing both throughput and energy efficiency in dense compute clusters.

Verified Compatibility

Rigorously tested server memory for Dell PowerEdge R760, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650, and more.

FAQ