General

Engineer's Note

This DDR4-2400 Registered ECC module with dual-rank x8 organization is optimized for enterprise servers and workstations running memory-intensive workloads such as virtualization and in-memory databases, ensuring high data integrity through hardware error correction. The registered signal topology combined with dual-rank interleaving enhances stability under heavy loads, while the modest CL17 latency at 1.2V balances power efficiency and reliable command scheduling in dense multi-DIMM configurations.

Technical Specs & Insights

1. Registered signal type buffers the command/address bus, ensuring stable operation when populating all DIMM slots in a dense server node.
2. ECC error correction detects and corrects single-bit errors on the fly, preserving data integrity for mission-critical enterprise databases.
3. Dual Rank x8 organization leverages rank interleaving to boost effective memory bandwidth, lowering latency under heavy virtualization workloads.
4. DDR4 technology delivers higher frequency headroom and lower power per gigabit, shrinking the total cost of ownership in hyper-scale data centers.
5. 2400 MT/s transfer speed offers a sweet spot of throughput and compatibility, sustaining consistent application performance across mixed-generation server fleets.

Why These Specs Matter

The M393A1G43EB1-CRC0Q is a server RDIMM whose ECC, registered buffering, dual‑rank architecture, and efficient 1.2 V operation resolve the critical pain points of data‑center workloads. ECC directly protects your in‑memory databases such as Redis or SAP HANA from silent data corruption; a single‑bit flip in a cached financial transaction could propagate errors to permanent storage, but this module corrects them inline, preserving transactional accuracy and preventing costly audit failures. The registered clock driver stabilizes high‑density configurations, so when you fully populate channels for a VMware or KVM host running dozens of virtual machines, it eliminates the signal noise that causes unbuffered DIMMs to trigger hypervisor crashes and unplanned downtime. Its dual‑rank x8 design enables rank interleaving—the memory controller overlaps commands between ranks, boosting effective bandwidth for concurrent database queries and rapid VM memory swapping without adding extra modules. Finally, the 1.2 V DDR4‑2400 specification keeps thermal load and power draw firmly in check, directly lowering cooling opex as you scale your virtualization cluster or real‑time analytics farm. For environments where every transaction and guest instance counts, these four attributes transform raw silicon into a pillar of reliability, throughput, and density.

Endurance & Reliability

General Virtualization
For a typical hypervisor hosting mixed workloads, populate all memory channels with identical 8GB RDIMMs to maximize bandwidth and maintain NUMA balance. Aim for at least four modules per CPU (e.g., 32GB total) to service a moderate number of VMs, scaling up to eight or more modules as guest density increases, while leaving room for future expansion.

In-Memory Database
Low-latency in-memory databases demand both capacity and consistent access times; deploy the full channel count per socket with 8GB dual-rank modules to exploit rank interleaving and avoid memory bus throttling. Target 64–256GB configurations using twelve or more RDIMMs to hold entire datasets in DRAM, reducing swap and yielding predictable query performance under heavy concurrency.

High-Performance Computing
HPC clusters benefit from balanced memory bandwidth rather than sheer capacity per node. Install one 8GB dual-rank RDIMM per channel (typically six or eight modules per CPU) to sustain peak throughput for memory-bound simulations. In scale-out environments where cost and power matter, this module size provides sufficient headroom for MPI tasks while keeping per-node density aligned with fabric and storage throughput.

Verified Compatibility

Rigorously tested, this 8GB DDR4 RDIMM is verified compatible with Dell PowerEdge R740, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650.

FAQ