General

Engineer's Note

This 64GB DDR4-3200 RDIMM with ECC and registered buffering is designed for enterprise server platforms, making it ideal for memory-intensive workloads such as virtualization and in-memory databases that demand the highest data integrity. Its dual-rank configuration enables effective rank interleaving for sustained bandwidth, while the registered signal type and ECC correction maintain stable, error-free operation in high-density 288-pin deployments.

Technical Specs & Insights

1. Ample per-module capacity allows dense server configurations to reach terabyte-scale memory footprints, sustaining heavy virtualization and large in-memory database workloads without swapping to slower storage.
2. The elevated data rate delivers higher memory bandwidth, reducing data retrieval latency for transactional databases and accelerating time-to-insight in real-time analytics pipelines.
3. Integrated error correction eliminates single-bit memory faults and detects multi-bit corruption, preserving data integrity for financial ledgers, scientific computations, and other mission-critical services.
4. The registered buffer decouples the command and address bus from heavy loading, enabling stable multi-DIMM channels and maintaining reliable signal integrity under sustained 24/7 uptime.
5. Dual rank organization leverages rank interleaving to keep data buses continuously utilized, improving memory-level parallelism and sustaining consistent throughput under highly concurrent multi-core server workloads.

Why These Specs Matter

In high-density server environments, the M393A8G40CB4-CWEGY is not merely a memory module—it is a foundation for operational certainty. As a 64GB DDR4-3200 Registered DIMM with ECC, its architecture directly addresses the uncompromising reality of data centers where silent corruption is intolerable. The Error-Correcting Code functionality works continuously in the background, detecting and correcting single-bit flips caused by cosmic rays or electrical noise. In a virtualized cluster hosting dozens of critical VMs, a single uncorrected bit error can cascade into guest kernel panics or silent data corruption in transactional databases; this module eliminates that risk, turning unexpected radiation events into non-events.

The Registered signal type and Dual Rank organization serve a distinct purpose when scaling memory capacity. In a memory-intensive database like SAP HANA or a real-time analytics platform, populating all DIMM slots with high-capacity modules often strains the memory controller’s signal integrity. The on-DIMM register buffers the command and address lines, stabilizing the electrical load so the system can run fully populated 24-slot configurations at the full 3200MT/s speed without throttling. Meanwhile, the Dual Rank design interleaves access across two internal 32GB ranks, delivering measurably higher sustained bandwidth under multi-threaded query workloads compared to single-rank alternatives. This directly translates into faster in-memory table scans and reduced latency for concurrent users. The 1.2V operating voltage further ensures thermal consistency across densely packed racks, keeping cooling costs predictable. For any enterprise workload where data integrity, raw memory capacity, and unshakable bandwidth define service quality, this RDIMM converts architectural specifications into measurable business reliability.

Endurance & Reliability

Server Memory Identification
This is a server-grade DDR4-3200 Registered ECC RDIMM (288-pin, 1.2V, CL22, dual rank) with 64GB capacity per module. It is designed for platforms requiring data integrity, high density, and multi-channel memory architectures.

General Virtualization
Virtualized hosts thrive on total capacity and reliability. Deploy at least four of these 64GB RDIMMs (256GB total) evenly across the server’s memory channels — for example, one DIMM per channel in an 8-channel system — to maximize memory bandwidth while leaving slots for future scaling. Registered ECC ensures uninterrupted operation for dozens of VMs.

In-Memory Database
In-memory databases demand both massive capacity and low latency. Populate all memory channels symmetrically with these 64GB dual-rank DIMMs to achieve peak throughput, as dual-rank modules often benefit from rank interleaving. Avoid mixing capacities per channel; a balanced configuration (e.g., 512GB across 8 channels using 8 DIMMs) sustains consistent CL22 latency under heavy transactional loads.

High Performance Computing (HPC)
HPC workloads are sensitive to memory bandwidth. Install these DIMMs in a balanced, one-DIMM-per-channel (1DPC) layout first to run at the full 3200 MT/s speed without signal loading penalties. Scale to two DIMMs per channel only if capacity is insufficient, and account for any necessary speed reduction. The registered ECC and dual-rank design provide the stability and performance needed for parallel simulation and large-scale modeling.

Verified Compatibility

This rigorously tested 64GB DDR4-3200 RDIMM is compatible with Dell PowerEdge R750, HPE DL380 Gen10, and Lenovo SR650 V2.

FAQ