General

Engineer's Note

This 64GB DDR5-4800 Registered ECC RDIMM is purpose-built for server platforms running memory-intensive workloads like virtualization and in-memory databases, where its dual-rank x4 configuration boosts interleaved throughput and ECC safeguards critical data integrity. The registered signal type and low 1.1V operating voltage deliver exceptional signal stability and power efficiency even in fully populated 288-pin server banks.

Technical Specs & Insights

1. Registered buffering stabilizes command and address signaling, enabling reliable operation across fully loaded server memory channels without signal degradation.
2. ECC protection continuously detects and corrects memory faults, safeguarding critical enterprise data integrity for financial ledgers and hypervisor-managed workloads.
3. Generous per-module capacity reduces the number of DIMMs needed, maximizing memory density per rack unit for heavy virtualization and in-memory database deployments.
4. Dual-rank organization interleaves access across multiple internal banks, sustaining consistent bandwidth under concurrent multi-VM and container processing.
5. High-speed DDR5 interface provides the elevated throughput required to saturate modern multi-core server processors, accelerating real-time analytics and AI inference.

Why These Specs Matter

The M321R8GA0BB0-CQKUQ is a 64GB DDR5-4800 Registered DIMM purpose-built for mission-critical server workloads, where its four defining characteristics directly address real-world pain points. Its ECC protection is indispensable in two high-stakes scenarios: an in-memory database like SAP HANA, where a single undetected bit flip can silently corrupt financial records or transactional states, and a virtualized cluster running dozens of VMs per host, where a memory error can cascade into hypervisor failure and multi-tenant downtime. ECC catches and corrects these faults in real time, preserving data integrity and service continuity. The registered architecture buffers command and address signals, enabling a server to populate more DIMMs per channel without signal degradation. This directly raises VM density and consolidation ratios, cutting hardware sprawl and licensing costs. Meanwhile, the dual-rank x4 organization uses bank interleaving to amplify effective bandwidth and reduce latency, a critical edge when simultaneous VM and database threads hammer memory. The 64GB capacity per stick maximizes memory footprints while keeping slots free for future growth in analytics platforms. Operating at 1.1V, the module also delivers DDR5’s superior power efficiency, lowering cooling and electricity expenses. For your data center, it means resilient performance, greater scalability, and a measurably lower total cost of ownership.

Endurance & Reliability

General Virtualization
For a dual-socket server, populate all eight memory channels per CPU with one 64 GB RDIMM each (1DPC). This yields 512 GB per socket, providing ample capacity for high VM density while sustaining full 4,800 MT/s speed. The ECC and registered design ensures data integrity and stability across dozens of mixed-workload virtual machines.

In-Memory Database
Maximize total capacity by installing two 64 GB modules per channel (2DPC) on every available slot. On a dual-platform this easily exceeds 2 TB, enabling large in-memory datasets. Be aware that 2DPC may reduce the operating speed to 4,400 MT/s or lower—balance capacity against latency by testing with your specific database engine.

High-Performance Computing (HPC)
HPC workloads demand the highest memory bandwidth; fit one 64 GB DIMM per channel to achieve peak 4,800 MT/s throughput. With 8–12 channels per node this gives 512–768 GB, supporting memory-bound simulations and parallel solvers. Avoid mixing different ranks or capacities, and keep all channels populated for uniform, predictable performance.

Verified Compatibility

Rigorously tested server memory, compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen11, Lenovo ThinkSystem SR650 V3.

FAQ