General

Engineer's Note

This 64GB DDR4-2933 Registered ECC memory module with a Quad Rank x4 organization is engineered for enterprise servers, delivering the high reliability and data integrity essential for virtualization clusters and in-memory databases. The registered signal topology stabilizes multi-DIMM configurations at 2933 MT/s, while ECC corrects single-bit errors and the quad-rank design maximizes bank-level parallelism to sustain bandwidth under heavy, concurrent workloads.

Technical Specs & Insights

1. A 64GB capacity per stick delivers exceptional memory density, allowing virtualization-heavy servers to host significantly more VMs per node before running out of DIMM slots.
2. The 2933 MT/s data rate provides higher peak bandwidth for memory-bound workloads, shrinking query times in large-scale databases and real-time analytics.
3. Integrated ECC corrects single-bit errors on the fly, shielding mission-critical applications from silent data corruption that could crash transactions or invalidate datasets.
4. Registered logic with onboard buffers cleans and re-drives signals, enabling reliable operation across fully populated multi-channel layouts where unbuffered modules would suffer instability.
5. Quad Rank x4 construction combines four ranks of x4-wide DRAM, keeping rank interleaving active for sustained throughput under heavy concurrency without exceeding platform loading limits.

Why These Specs Matter

The M393A8G40MB2-CVFG0 64GB DDR4-2933 RDIMM transforms data-center infrastructure through four essential attributes. ECC error correction prevents silent data corruption that could crash a virtualization host running dozens of VMs, safeguarding uptime and financial transactions. The registered clock buffer stabilizes command signals across fully populated multi-channel configurations, ensuring reliable operation at 2933MT/s even under heavy memory interleaving—vital when you allocate large memory pools to each virtual machine. The quad-rank x4 design boosts bandwidth by interleaving accesses across internal banks, directly accelerating in-memory databases like Redis or SAP HANA where every microsecond counts. Additionally, the 1.2V low operating voltage keeps power and cooling costs down in dense deployments, while the registered buffer offsets the controller loading inherent to quad rank. For your hyperconverged cluster or real-time analytics platform, this module delivers the error-resilient, high-throughput capacity that keeps business-critical services running consistently.

Endurance & Reliability

Capacity Planning for a 64GB DDR4-2933 Registered ECC RDIMM

This module is a server-class DDR4-2933 RDIMM with ECC, registered buffering, and a quad-rank x4 organization. Designed for dual-socket and multi-socket platforms, it delivers high capacity and data integrity. The following recommendations address three common server workloads.

General Virtualization
Populate all memory channels with one DIMM per channel (1DPC) to maximize bandwidth while avoiding speed drops. For a modern dual-socket server with eight channels per CPU, sixteen of these 64GB modules provide 1 TB of total memory. This configuration supports high VM density and ensures consistent performance through ECC protection and balanced interleaving.

In-Memory Database
Latency-sensitive databases demand balanced memory access. Install identical quad-rank DIMMs across all channels, ideally one per channel, to achieve full 2933 MT/s speed and maximum bandwidth. With eight channels per socket this yields 512 GB per CPU, enabling large in-memory datasets to reside locally without NUMA penalties. Favor 1DPC over 2DPC to maintain low latency.

High Performance Computing
For bandwidth-bound HPC workloads, use one DIMM per channel to run at the rated 2933 MT/s with the lowest latency. This provides 512 GB per socket on an eight-channel platform, ideal for most simulation and modeling tasks. If capacity demands exceed bandwidth, installing two quad-rank DIMMs per channel is possible but will likely force a downshift to 2666 MT/s; only choose this when total memory capacity is the primary constraint.

Verified Compatibility

Rigorously tested and validated for Dell PowerEdge R760, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650.

FAQ