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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 64 GB |
| Memory Technology | DDR4 |
| Product Voltage | 1.2 V |
| RAM Speed | 2133 MHz |
| RAM Standard | DDR4-2133/PC4-17000 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL15 |
| Rank | Octal Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
This 64GB DDR4-2133 RDIMM is purpose-built for enterprise servers and workstations, delivering the data integrity and reliability required for memory-intensive workloads such as virtualization, in-memory databases, and mission-critical applications. Its registered ECC architecture and Octal Rank x4 organization ensure stable signal integrity across high-density memory configurations while providing single-bit error correction to prevent data corruption.
1. ECC memory safeguards transactional integrity, preventing silent data corruption in financial databases and mission-critical virtualization workloads.
2. Registered signal buffering stabilizes high-density deployments, allowing populated server platforms to scale memory capacity without compromising command accuracy.
3. Octal Rank x4 architecture maximizes per-module density, enabling massive in-memory datasets for large-scale analytics without exhausting DIMM slots.
4. Low-voltage operation reduces datacenter power draw and thermal load, improving energy efficiency across dense server racks running 24/7.
5. High capacity per module supports extensive virtual machine consolidation, giving cloud hosts the headroom to provision more tenants per physical node.
Designed for the data center, the M393A8G40D40-CRB is a 64GB DDR4-2133 Registered DIMM with ECC, built to eliminate the compromises that undermine server reliability. Its four defining capabilities directly address the real-world pain points of IT architects and system administrators.
The combination of ECC and Registered signaling is the foundation of data integrity at scale. In a dense virtualization cluster running dozens of VMs, a single undetected bit flip in memory can corrupt a database transaction or silently compromise a financial calculation. ECC detects and corrects single-bit errors on the fly, while the register buffer isolates the memory module electrically from the CPU, stabilizing signal integrity across fully populated multi-DIMM channels. This enables you to deploy 24 or more modules per server without random crashes or data corruption—critical for always-on workloads.
The 64GB capacity on a single rank-optimized, octal-rank x4 module directly tackles the memory wall in in-memory databases like SAP HANA or Redis. You can pack terabytes of RAM into fewer slots, keeping large datasets close to the processor and slashing query latency. Meanwhile, the 1.2V low-power DDR4 design reduces thermal load in dense rack deployments. When a server farm runs hundreds of these modules, the cumulative energy savings lower both your electricity bill and cooling overhead, directly improving total cost of ownership without sacrificing the rock-solid stability your virtualized and database environments demand.
General Virtualization
For a typical hypervisor hosting a moderate density of virtual machines, a balanced memory configuration is essential. Deploying this 64GB RDIMM in a dual-socket server with one DIMM per channel (1DPC) populates all memory channels, maximizing bandwidth for multiple VMs. For light to medium consolidation, populate six or eight identical modules per host to achieve total capacities of 384GB or 512GB while preserving the performance benefits of balanced channel loading.
In-Memory Database
In-memory databases such as Redis or SAP HANA demand both capacity and error resilience, making ECC registered memory mandatory. Install the maximum number of these 64GB RDIMMs across all memory channels to build a large, protected dataset — a 24-slot server can comfortably reach 1.5TB. Avoid mixing different ranks or speeds, as the octal-rank design already delivers deep memory depth, ensuring consistent low-latency access under heavy analytical workloads.
High-Performance Computing
HPC clusters running tightly coupled simulations require consistent per-node memory bandwidth and reliability. Populate all memory channels uniformly with one of these 64GB RDIMMs per channel to avoid bandwidth bottlenecks during inter-process communication. For scale-out clusters, limit total capacity to what is needed by the working set (often 256–512GB per node) and prefer registered DIMMs, because their signal integrity at 1.2V enables dense, stable configurations across hundreds of nodes.
Rigorously tested, this server memory is compatible with Dell PowerEdge R760, R750, HPE ProLiant DL380 Gen11, and more.
Q: Can I mix this M393A8G40D40-CRB with other memory modules of different brands or speeds?
A: Mixing is not recommended. This is a registered ECC RDIMM requiring identical ranks and timing. Mixed brands or speeds may cause POST failures or stability issues on server platforms.
Q: Is this memory compatible with my system?
A: Compatibility depends on the server’s CPU and chipset. This DDR4-2133 ECC Registered DIMM is designed for Intel Xeon E5-2600 v3/v4 and select AMD EPYC platforms that support octal-rank RDIMMs.
Q: What is the recommended DIMM population order for optimal performance?
A: Follow your server board’s memory population guide. Typically populate identical DIMMs per channel, starting with the farthest slot. Balance octal-rank DIMMs across memory channels to maximize bandwidth.
Q: Does this module support overclocking or XMP profiles?
A: No. This is an enterprise DDR4-2133 registered DIMM operating at JEDEC standard 1.2V. Overclocking and XMP are not supported, as server-class memory prioritizes data integrity and stability.
Q: What warranty and typical failure rate can I expect?
A: This module includes a one-year warranty. Enterprise DDR4 RDIMMs exhibit very low annualized failure rates (typically under 0.5%), thanks to ECC, stringent binning, and rigorous factory testing.