General

Engineer's Note

This RDIMM is a server-grade DDR4 module, designed specifically for enterprise platforms running virtualization, in-memory databases, and mission-critical workloads where data integrity is paramount. Its Registered signal type and ECC ensure robust command/address stability and single-bit error correction, while the quad-rank x4 configuration maximizes capacity density per channel at DDR4-2400 speed for balanced throughput in multi-socket servers.

Technical Specs & Insights

1. ECC protection automatically corrects single-bit errors in real time, preserving data integrity for transactional databases and mission-critical enterprise workloads where even a single bit flip can cause financial discrepancies.
2. Registered signal buffering stabilizes command and address lines across fully populated memory channels, ensuring reliable operation in dense rack servers that demand large total memory footprints.
3. Quad Rank x4 organization condenses high capacity onto a single module, maximizing memory per slot to support higher virtual machine density and in-memory analytics without sacrificing DIMM count headroom.
4. The substantial per-module capacity allows data centers to equip servers with ample memory-to-core ratios, keeping large-scale Kubernetes pods and memory-hungry SaaS applications responsive under heavy consolidation.
5. DDR4-2400 bandwidth delivers a balanced throughput envelope for steady data streaming, efficiently handling simultaneous cloud tenant requests while keeping thermal and power overheads predictable.

Why These Specs Matter

When you deploy a virtualization cluster or an in-memory database like SAP HANA, silent data corruption is not an option—it can crash hypervisors or poison financial records. The M393A8K40B2B-CTC RDIMM is engineered precisely for this world. Its ECC technology detects and corrects single-bit errors in real time, effectively neutralizing the bit flips caused by cosmic radiation that become statistically inevitable at 64 GB densities. The registered signal buffer means the memory controller drives only the buffer, not every DRAM chip directly; this cleans up electrical loading so you can populate all channels with Quad Rank x4 modules and still maintain rock‑solid 2400 MHz operation—critical when a single ESXi host must run dozens of VMs without memory‑related faults. That same Quad Rank architecture further amplifies internal bank parallelism, raising sustained throughput for large‑page workloads. And because the 1.2 V DDR4 design runs cooler than previous generations, a fully‑loaded server rack dissipates less heat, keeping you within tight thermal budgets while 64 GB per stick reduces the need to expand nodes. In short, this module transforms raw capacity into the fault‑resilient, high‑stability foundation that enterprise data centers demand.

Endurance & Reliability

General Virtualization
Deploy this 64GB RDIMM in pairs or sets of four to maximize memory bandwidth across all CPU memory channels. For a typical dual-socket hypervisor hosting 20–30 moderate VMs, start with eight modules (512GB total, one DIMM per channel) to balance capacity and cost. Leverage the ECC and registered buffering to ensure data integrity and stable overcommitment under mixed workloads.

In-Memory Database
Populate all available channels with this quad-rank RDIMM to minimize latency-sensitive stalls in large Redis or SAP HANA instances. Configure a single-socket server with twelve modules for 768GB total, keeping the dataset entirely in RAM while leaving headroom for persistence and replication overhead. The registered, 1.2V design supports sustained full-load operation without thermal throttling in well-cooled chassis.

High-Performance Computing
For memory-bandwidth-bound simulations, install one module per channel (e.g., eight 64GB sticks for 512GB on dual-socket nodes) to avoid rank contention while still delivering ample per-core capacity. The DDR4-2400 clock and CL17 timing strike a practical balance between throughput and power draw across dense cluster nodes. Scale out identically across nodes to maintain predictable MPI job performance.

Verified Compatibility

Proven reliable, this 64GB DDR4-2400 RDIMM fits Dell PowerEdge R760, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650, and similar servers.

FAQ