General

Engineer's Note

This 256GB DDR4-2933 RDIMM with Octal Rank x4 architecture delivers maximum density per slot for memory-intensive server workloads, while its registered signaling and ECC provide critical signal integrity and end-to-end data protection in large-scale virtualization and in-memory database deployments.

Technical Specs & Insights

1. A massive memory capacity enables extreme server consolidation, letting you run hundreds of virtual machines or containers simultaneously without swapping to slower storage.
2. Octal Rank x4 organization packs the highest density per DIMM slot, keeping memory channels fully utilized and sustaining throughput under heavy in-memory database workloads.
3. The registered buffer chip stabilizes signal integrity across fully populated server boards, eliminating the electrical loading issues that would crash unregistered modules in 24/7 operations.
4. End-to-end ECC error correction proactively detects and fixes single-bit data corruption, safeguarding financial ledgers, scientific simulations, and hypervisor integrity against silent errors.
5. DDR4-2933 throughput provides the bandwidth headroom to feed multi-core server CPUs, accelerating real-time analytics and large-scale in-memory processing without stalling pipelines.

Why These Specs Matter

When you deploy a single 256GB DDR4-2933 RDIMM like the Samsung M386ABG40M5B-CYFC0, you are not just adding capacity—you are directly confronting the real-world failure points that keep data center architects awake at night. In a dense virtualization cluster, where dozens of VMs share a physical host, a silent bit-flip in a hypervisor’s memory structure can cascade into cross-tenant corruption. The module’s ECC engine detects and corrects single-bit errors on the fly, turning a potential financial transaction rollback into a non-event. Its registered architecture buffers command and address signals, which is essential when you populate all available channels with high-density Octal Rank x4 modules; without that clocked re-driving, electrical loading would force you to throttle speeds or sacrifice stability precisely when you are running an in-memory database like SAP HANA that demands deterministic latency at terabyte scale. That same 1.2V low-power design, paired with true 2933 MT/s bandwidth and CL21 access timing, sustains a massive analytical workload while keeping thermal margins in check—meaning a fully loaded 2TB server node can run complex OLAP queries without throttling under the rack’s power ceiling. Every aspect of this module translates directly into fewer application stalls, smaller maintenance windows, and a lower total cost of ownership for memory-bound enterprise workloads.

Endurance & Reliability

General Virtualization
A single 256GB Registered DIMM delivers massive capacity per slot, allowing dense consolidation of VMs with minimal physical footprint. For dual-socket servers, populate at least one DIMM per memory channel (e.g., 8 modules per socket) to maintain balanced NUMA performance, achieving terabyte-scale pools without sacrificing DDR4-2933 speed when limited to one DIMM per channel.

In-Memory Database
Low-latency databases demand both capacity and reliability; ECC protection on this octal-rank module guards against data corruption during intense writes. Configure a symmetric multi-channel population (one 256GB DIMM per channel on both sockets) to maximize interleaving, ideally targeting 2TB total capacity per server to cache entire datasets and reduce storage I/O.

High-Performance Computing
HPC workloads benefit from high memory bandwidth; use a balanced configuration with identical DIMMs across all channels to avoid performance drops from rank imbalance. With 256GB modules, a single DIMM per channel approach sustains full 2933 MT/s throughput, and for capacity-bound simulations, doubling to two DIMMs per channel remains viable with a slight frequency compromise.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge R750, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650 V2, and more.

FAQ