General

Engineer's Note

This is a server-class DDR3 RDIMM engineered for legacy enterprise platforms, ideally suited for memory-intensive workloads like virtualization and in-memory databases where data integrity is critical. The quad-rank x4 organization maximizes capacity density per channel, while registered ECC operation ensures signal stability and single-bit error correction for 24/7 reliability.

Technical Specs & Insights

1. ECC protection detects and corrects single-bit errors in real time, preventing silent data corruption in transactional databases and financial processing.
2. Registered signal buffering stabilizes command and address lines, allowing dense memory populations without compromising signal integrity in large-scale virtualization clusters.
3. Quad Rank x4 organization maximizes bank-level parallelism, sustaining high throughput during simultaneous multi-tenant workloads and heavy I/O operations.
4. 16GB capacity provides substantial headroom for memory-resident caching and in-memory analytics, reducing storage bottlenecks under continuous query loads.
5. 1.5V standard voltage ensures broad platform interoperability while keeping thermal profiles manageable for always-on enterprise deployments.

Why These Specs Matter

The Samsung module M393B2K70DM0-CF8Q5 is a registered DDR3 RDIMM purpose-built for server workloads, and its four defining characteristics directly answer the real-world pain points of data center operators. ECC error correction acts as your silent guardian in an in-memory database environment — imagine a financial trading platform where a single flipped bit could corrupt a multi-million-dollar transaction. ECC detects and corrects that error on the fly, preserving transactional integrity without performance penalties. The registered buffer circuitry takes center stage in a dense virtualization cluster. When you populate all 24 DIMM slots per host to maximize VM density, signal distortion becomes a genuine risk; the register redrives command and address signals, stabilizing communication and preventing the mysterious crashes that would otherwise bring down your entire tenant stack. Coupled with quad rank x4 organization, this 16GB module packs the capacity headroom that heavy oversubscription demands, keeping virtual machines responsive under load. Even the CL7 latency gives a tangible edge — in memory-cached databases like Redis, lower CAS latency means faster key retrieval, reducing microseconds that add up to real throughput gains. Beneath all of this, the standard 1.5 volts ensures predictable thermals in dense rack deployments, maintaining consistency during sustained operations. This is not merely memory; it’s a reliability backbone for your mission-critical services.

Endurance & Reliability

Server Memory Identification
The given specs—DDR3-1066, ECC, Registered, Quad Rank x4, 240-pin RDIMM—clearly classify this as server-grade memory. Capacity planning must account for the module’s 16GB density and its quad-rank loading limits per channel in multi-DIMM configurations.

General Virtualization
Virtualized hosts thrive on ample memory for VM density. Using these 16GB RDIMMs, populate six to eight modules across triple-channel or quad-channel server boards to reach 96–128GB, balancing cost-per-gigabyte with sufficient headroom for moderate overcommitment. Avoid maxing out all slots initially to preserve future expansion.

In-Memory Database
Low-latency in-memory databases demand large, contiguous capacity with reliability. Install six or eight of these 16GB ECC RDIMMs for a 96–128GB pool, aligning channels for optimal bandwidth. Strictly populate identical quad-rank DIMMs per channel to prevent signal degradation and ensure rock-solid data integrity.

High-Performance Computing (HPC)
HPC workloads require sustained throughput and minimal swapping. Deploy six or twelve modules in triple-channel setups (96GB or 192GB total) to match per-socket memory bandwidth needs. Be mindful of quad-rank speed drops—this DDR3-1066 kit may downclock to 800MHz when fully loaded, so balance capacity against achievable frequency.

Verified Compatibility

Rigorously tested server memory; compatible with Dell PowerEdge R720, HP ProLiant DL380p Gen8, and Lenovo System x3650 M4.

FAQ