General

Engineer's Note

This 128GB DDR4-2933 RDIMM is purpose-built for enterprise servers running memory-intensive workloads such as hypervisor virtualization and large in-memory databases. The quad-rank x4 configuration maximizes capacity density per channel while the registered ECC architecture guarantees signal integrity and end-to-end data integrity under heavy, sustained loads.

Technical Specs & Insights

1. 128GB capacity per module allows a single server to host dozens of additional virtual machines, directly boosting consolidation ratios in enterprise data centers.
2. ECC protection silently corrects single-bit errors in real time, preventing silent data corruption that could crash financial transactions or database queries.
3. Registered signal type stabilizes command and address lines across fully loaded server boards, ensuring reliable operation even with all 24 DIMM slots populated.
4. 2933 MT/s speed supplies the sustained high-bandwidth pipeline that in-memory analytics and large-scale virtualization workloads depend on for low-latency data access.
5. Quad Rank x4 organization interleaves multiple internal banks to maximize channel utilization, delivering predictable throughput under the heavy, concurrent access patterns of multi-tenant cloud platforms.

Why These Specs Matter

The 128GB DDR4-2933 RDIMM (M386AAG40MMB-CVFBY) is purpose-built for servers running virtualized clusters and in-memory databases. Its ECC corrects single-bit errors that could otherwise corrupt data or crash VMs—critical when hundreds of tenants share physical hardware. Registered buffering stabilizes signal integrity across fully-loaded server boards, ensuring consistent latency and reliable operation at scale, which is a must for VMware farms or Kubernetes nodes. The quad-rank x4 architecture packs the entire 128GB into a single slot, maximizing DIMM real estate so you can reach terabyte-level capacity in 2-socket systems without sacrificing upgrade headroom. Running at 2933 MT/s at just 1.2V, the module delivers the bandwidth to feed dozens of processor cores while keeping power and cooling costs low—ideal for memory-intensive analytics like SAP HANA or Redis clusters. In short, these features translate directly to uninterrupted uptime, data accuracy, and lower total cost of ownership.

Endurance & Reliability

General Virtualization
For a general virtualization host, balance memory capacity and cost per virtual machine. Install this 128 GB RDIMM in multiples of six or eight modules across the available channels — for a dual-socket server with 12 DIMM slots per CPU, a set of eight modules provides 1 TB of total capacity, comfortably supporting dozens of mixed-workload VMs. Populating all channels with identical 128 GB sticks maximizes memory bandwidth and ensures predictable NUMA performance, which is essential for consistent quality of service.

In-Memory Database
In-memory databases demand very large, low-latency memory pools without capacity bottlenecks. Deploy 8 or 16 of these 128 GB quad-rank modules to reach 1–2 TB per node, allowing entire datasets to reside in DRAM at 2933 MT/s. Keep all memory channels populated symmetrically to avoid performance cliffs, and configure the server for maximum RAS with ECC and advanced error containment, since even single-bit errors can corrupt transactional integrity.

High-Performance Computing
HPC clusters running tightly coupled simulations require high bandwidth and ample capacity per node. Fill all eight memory channels on each compute node with one 128 GB RDIMM per channel, delivering 1 TB of registered ECC memory while sustaining peak DDR4-2933 throughput. This uniform population pattern eliminates channel imbalance and minimizes latencies during collective operations, making it ideal for memory-bound CFD or weather modeling workloads.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge R750, HPE ProLiant DL380 Gen10, and Lenovo ThinkSystem SR650 V2.

FAQ