General

Engineer's Note

This 64GB DDR4-2400 RDIMM, with its quad-rank x4 organization and CL17 latency, is engineered for dense virtualization and in-memory database workloads where maximizing capacity per channel is critical. Its registered signal topology and integrated ECC ensure superior signal integrity and data reliability under sustained heavy loads, making it ideally suited for enterprise-class server platforms requiring uncompromising uptime.

Technical Specs & Insights

1. A 64GB capacity per module enables extreme memory density in 2-socket servers, allowing hundreds of virtual machines to reside on a single physical host without swapping to slower storage.
2. ECC protection silently corrects single-bit errors in real time, preserving data integrity for financial transactions and in-memory databases where accuracy is non-negotiable.
3. Registered signal type buffers the command and address lines, stabilizing signal integrity across fully loaded multi-DIMM channels that large-scale deployments demand.
4. Quad Rank x4 organization packs more DRAM packages onto the stick, maximizing total system memory at the cost of a slight speed penalty—an acceptable trade-off for capacity-hungry analytics workloads.
5. DDR4-2400 speed delivers 19.2 GB/s of peak bandwidth per channel, sustaining smooth data pipelines for concurrent OLAP queries and real-time streaming ingest.

Why These Specs Matter

The Samsung M386A8K40CM2-CRC5Q is a 64GB DDR4-2400 Registered DIMM built specifically for servers, and its design directly addresses the critical realities of enterprise computing. Its ECC engine actively corrects single-bit errors caused by cosmic radiation or electrical noise, meaning your in-memory database such as SAP HANA never serves a silently corrupted transaction or a flawed financial report. The Registered buffer manages the electrical load of the module’s dense Quad Rank x4 organization, preserving clean signal integrity even when all memory channels are fully populated. For a virtualization cluster running dozens of VMs on a single host, this translates into large, rock-steady memory capacity that an unbuffered DIMM simply cannot sustain without risking a catastrophic hypervisor crash. Meanwhile, the Quad Rank structure internally interleaves accesses across four ranks, boosting effective bandwidth and reducing contention for real-time analytics and high-concurrency OLTP databases. Underpinning everything is the 1.2V low-power operation, which curbs thermal stress and cuts energy bills across multi-node racks, allowing your infrastructure to scale reliably without hidden cost.

Endurance & Reliability

General Virtualization
For dense VM consolidation, deploy this 64GB RDIMM in a balanced multi-channel configuration—typically 8 or 16 identical modules across all CPU memory channels. Uniform population maximizes interleaving and prevents NUMA imbalances, ensuring predictable latency for mixed workloads. Reserve headroom for hypervisor overhead and live migration bursts by targeting 70–80% utilization, leaving room for failover capacity.

In-Memory Database
Large quad-rank 64GB modules suit datasets that demand minimal swap and maximum resident set size. Populate all channels symmetrically to sustain high bandwidth under heavy read/write concurrency, as in Redis or SAP HANA. Given the CL17 latency and 2400MHz speed, pair these modules with processors supporting high memory throughput, and consider module sparing to guard against uncorrectable errors on critical in-memory tables.

High Performance Computing
Quad-rank x4 RDIMMs offer reliability under sustained parallel computing, but the 2400MHz clock rate can bound per-core bandwidth in frequency-sensitive HPC codes. Load two DIMMs per channel for capacity while retaining one open slot per channel to preserve signal integrity at speed. Combine with job scheduling that aligns memory footprints to NUMA nodes, and use ECC logging to preemptively retire weak cells during checkpointed workloads.

Verified Compatibility

Validated server memory: rigorously tested, compatible with Dell PowerEdge R740, HPE DL380 Gen10, Lenovo ThinkSystem SR650.

FAQ