General

Engineer's Note

Designed for server platforms, this 64GB DDR4-2133 RDIMM leverages registered signal buffering and ECC to ensure data integrity under heavy virtualization and in-memory database workloads. Its quad-rank x4 configuration maximizes memory density per channel while the low CL15 latency and 1.2V efficiency make it ideal for scalable, mission-critical enterprise deployments.

Technical Specs & Insights

1. ECC protection detects and corrects single-bit errors on the fly, preserving data integrity for business-critical databases and preventing silent data corruption that could lead to costly application downtime.
2. Registered buffering reduces the electrical load on the memory controller, allowing fully populated server boards to maintain signal integrity and stable operation across large-scale virtualization clusters.
3. A 64-gigabyte module density empowers IT architects to deploy substantial in-memory caches and larger virtual machine footprints without sacrificing memory channel balance.
4. Quad Rank x4 organization packs more DRAM ranks per channel, sustaining peak bandwidth utilization under mixed workloads and keeping latency predictable during periods of heavy enterprise consolidation.
5. Low 1.2V operating voltage shaves off watts in dense rack deployments, shrinking both the power bill and the thermal envelope so cooling infrastructure can be optimized for higher compute density.

Why These Specs Matter

In data centers, the M393A8K40B21-CRB40 64GB DDR4-2133 Registered ECC RDIMM is engineered for reliability at scale. ECC silently detects and corrects single-bit errors caused by background radiation, preventing application crashes and data corruption in financial databases or in-memory caches. The Registered buffered architecture isolates the memory controller from the electrical load of multiple DIMMs, so you can populate all channels with Quad Rank x4 modules and achieve 1TB+ RAM per node without signal degradation—critical for dense VMware or Kubernetes clusters hosting hundreds of VMs. Quad Rank x4 not only doubles capacity per slot but provides more internal banks for parallel access, sustaining bandwidth when multiple VMs concurrently hit memory. Finally, low 1.2V operation reduces energy draw and thermal load, lowering cooling OPEX. Together, they deliver the uptime, capacity, and efficiency your always-on services demand.

Endurance & Reliability

General Virtualization
For general virtualization hosts, populate a balanced number of 64GB RDIMMs across all memory channels to maximize bandwidth while leaving room for future growth. A common configuration is 8 modules (512GB total) in a dual-socket server, enabling comfortable overcommit ratios for dozens of mixed-workload VMs without excessive NUMA penalties.

In-Memory Database
In-memory databases demand both high capacity and low latency, making these quad-rank 64GB Registered ECC DIMMs an excellent fit. Install a full set of modules (e.g., 16 x 64GB for 1TB or 24 x 64GB for 1.5TB) to keep entire datasets resident in RAM, and ensure one DIMM per channel to avoid rank contention that could throttle peak transaction rates.

High-Performance Computing (HPC)
HPC workloads thrive on memory bandwidth, so fill every available memory channel — ideally one 64GB Registered DIMM per channel — to enable optimal interleaving and sustain heavy floating-point throughput. While 2133MHz is modest, the large capacity per module lets you build cost-effective quad-socket nodes with 512GB–2TB of ECC-protected memory for simulation, modeling, and large-scale data analysis.

Verified Compatibility

Rigorously tested for compatibility with Dell PowerEdge R730, HPE DL380 Gen9, and Lenovo x3650 M5 servers.

FAQ