Samsung M393A8G40D40-CRB0Q 64GB DDR4 RDIMM 2133MT/s|Reliable ECC RDIMM

General

Engineer's Note

Designed for enterprise server platforms, this 64GB DDR4-2133 RDIMM with ECC and registered signaling ensures data integrity and stability under heavy virtualization and in-memory database workloads. Its octal-rank x4 configuration enables exceptional memory density per channel, while the CL15 latency delivers a balanced response profile ideal for large-scale monolithic applications.

Technical Specs & Insights

1. ECC protection silently corrects single-bit errors in real time, preserving data integrity for financial transactions and database operations that demand absolute accuracy.
2. Registered signal buffering stabilizes the memory bus under heavy loads, letting hyperscale servers support massive DIMM populations without compromising system uptime.
3. High-capacity module density empowers dense virtualization hosts to run more concurrent enterprise VMs and large in-memory caches on a single physical node.
4. Octal Rank x4 organization increases memory depth per channel, sustaining balanced throughput under the heavy consolidation of memory-hungry analytics workloads.
5. JEDEC-standard baseline frequency delivers deterministic, energy-efficient bandwidth ideally suited for always-on server environments where consistent latency matters more than peak burst speed.

Why These Specs Matter

The M393A8G40D40-CRB0Q is a server-class 64GB DDR4-2133 Registered DIMM built for data centers, and its four defining characteristics directly answer the pain points of always-on enterprise workloads. First, ECC error correction silently detects and corrects single-bit memory faults. In a dense virtualization cluster hosting dozens of VMs, an undetected bit flip can corrupt a financial transaction or halt a critical service; ECC turns that statistical risk into operational assurance, keeping your SLAs intact. Second, the Registered signal buffer isolates the memory controller from the electrical load of multiple modules. This means you can populate all channels with high-capacity DIMMs without signal collapse, enabling the massive memory footprint that a bare-metal hypervisor needs to consolidate hundreds of virtual machines on one node. Third, the octal rank x4 organization enables aggressive rank interleaving: while one internal rank refreshes or processes a command, others remain ready to transfer data. For an in-memory database like Redis or SAP HANA, this parallelism sustains peak throughput under random-access pressure, cutting response latency when thousands of concurrent queries hit the dataset simultaneously. Finally, operating at a cool 1.2V, this DDR4 module helps contain the thermal and power budget inside a crowded rack—a practical necessity when scaling your memory-hungry analytics cluster without tripping circuit limits or driving up cooling costs. Every design choice here translates to tangible reliability, scalability, and performance where downtime is not an option.

Endurance & Reliability

General Virtualization
This 64GB RDIMM suits dense VM hosting. Deploy in multiples of six or eight per dual-socket server for balanced memory channels, yielding 384–512 GB total. Populate identically across memory risers to maintain NUMA symmetry and reliable ECC protection under mixed workloads.

In-Memory Database
Use kits of eight or sixteen modules to reach 512 GB–1 TB, keeping data sets fully resident. Configure all channels identically with identical rank count to avoid latency spikes. Registered ECC lowers silent data corruption risk during heavy write transactions, essential for Redis, Memcached, or SAP HANA footprints.

High-Performance Computing
Populate one DIMM per channel (1DPC) with eight modules per node for peak bandwidth at 2133 MT/s. Octal-rank x4 design delivers high capacity per slot but watch for slight latency penalty—ideal for memory-capacity-bound simulations. Pair with a balanced processor memory controller to sustain stream throughput across all cores during large-scale modeling.

Verified Compatibility

Tested compatible with Dell PowerEdge R740, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR630; 64GB DDR4-2133 ECC Registered DIMM.

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