General

Engineer's Note

Designed for server environments, this 64GB DDR4-2400 Registered DIMM with ECC and Quad Rank x4 configuration ensures mission-critical data integrity and high capacity density, making it ideal for virtualization clusters and in-memory databases. The registered signal type enhances command bus stability under heavy load, while the 288-pin 1.2V design maintains power efficiency at a CAS latency of 17.

Technical Specs & Insights

1. 64GB capacity enables higher virtual machine density per server, letting you consolidate more workloads while preserving responsive performance under hypervisor scheduling.
2. ECC protection silently corrects single-bit errors in the background, guarding financial calculations and database transactions against undetected data corruption.
3. Registered signal type buffers command and address lines, keeping electrical loading low so you can populate all memory channels and scale system memory well past a terabyte.
4. Quad Rank x4 organization interleaves banks across four internal ranks, delivering the sustained channel saturation that heavy in-memory analytics engines demand.
5. 2400MHz clock speed provides a peak throughput of 19.2 GB/s, shrinking the response window for frequently accessed server-side caches and accelerating concurrent user requests.

Why These Specs Matter

The M386A8K40CM2-CRC is a 64GB DDR4-2400 Registered ECC DIMM engineered for enterprise servers where reliability defines your bottom line. Four characteristics make it indispensable in real-world data centers. ECC actively detects and corrects bit-flips caused by background radiation, safeguarding data integrity in memory-hungry databases like SAP HANA—a single uncorrected error could corrupt financial records or trigger transaction rollback. Registered buffering reduces electrical load on the memory controller, so you can fully populate all 24 DIMM slots in a 2-socket server without signal degradation; this is vital for dense virtualization clusters running hundreds of VMs that cannot tolerate unexpected reboots under heavy I/O. The Quad Rank x4 design leverages rank interleaving to accelerate parallel data access, cutting effective latency for real-time analytics and high-frequency trading platforms where microseconds matter. Finally, a massive 64GB per module maximizes capacity while 1.2V operation keeps energy costs in check as you scale rack after rack. For your always-on infrastructure, this memory acts as an insurance policy against silent data corruption and performance hiccups, translating directly into continuous business uptime and predictable throughput.

Endurance & Reliability

Capacity Planning for Registered ECC DDR4-2400 64GB RDIMM

This module is a server-class Registered DIMM with ECC, ideal for data center environments. Below are capacity planning guidelines for key workload profiles.

General Virtualization
For hypervisor hosts running multiple VMs, memory is often the first bottleneck. Deploy in balanced configurations with a minimum of four modules (256GB) per dual-socket server to allocate 4-8GB per light VM comfortably. Populate all memory channels symmetrically to maximize bandwidth, leveraging the 64GB density for future scaling.

In-Memory Database
Solutions like Redis and SAP HANA demand low latency and data integrity. Configure a minimum of eight modules (512GB) per server and scale to 1TB+ using 16 or more DIMM slots, keeping the dataset fully in RAM. The ECC and registered features ensure reliability under constant, high-velocity read/write loads.

High-Performance Computing
HPC clusters require balanced throughput. Per node, install six or twelve modules (384GB/768GB) to match the CPU’s memory channels, crucial for computational fluid dynamics or genomic sequencing. This quad-rank module delivers deep capacity but may limit clock speed; prioritize maximum capacity per node for memory-bound parallel jobs.

Verified Compatibility

Validated for server compatibility: rigorously tested and compatible with Dell PowerEdge R730, HPE ProLiant DL380 Gen9, Lenovo x3650 M5.

FAQ