General

Engineer's Note

The M386B4G70DM0-CMA4Q is a server-grade DDR3-1866 RDIMM with ECC and registered signal integrity, optimized for virtualization and in-memory database workloads where data accuracy and uptime are critical. Its quad-rank x4 organization provides maximum 32 GB capacity per module, while the tight CL13 latency and registered architecture enable stable operation at high densities in multi-DIMM enterprise platforms.

Technical Specs & Insights

1. ECC protection continuously detects and corrects single-bit data errors, preserving the data integrity required for financial transactions and long-running enterprise applications.
2. Registered signal type stabilizes command and address signaling across densely loaded memory channels, which is essential for maintaining uptime in multi-socket server platforms.
3. Quad Rank x4 configuration saturates each memory channel with enough banks to sustain consistent throughput, preventing performance dips under heavy virtual machine consolidation.
4. The substantial module capacity enables higher virtual machine density per node, directly reducing hardware footprint and licensing costs in private cloud deployments.
5. Elevated memory clock speed drives faster data access rates, shrinking query response times for in-memory databases and real-time analytics workloads.

Why These Specs Matter

The M386B4G70DM0-CMA4Q is a 32 GB DDR3-1866 Registered ECC RDIMM purpose-built for enterprise servers, where uptime and data integrity are non-negotiable. In a virtualized cluster hosting dozens of business-critical VMs, the module’s ECC engine silently corrects single-bit memory errors. For you, this means the difference between a routine workload and a random hypervisor crash or silent data corruption that can corrupt a database transaction. The registered command/address buffer stabilizes signal paths across fully loaded memory channels, so even this dense quad-rank x4 DIMM operates reliably in servers with all 24 slots populated. That reliability directly translates to fewer unplanned reboots and lower total cost of ownership. In an in-memory database such as SAP HANA or Redis, the quad-rank design lets you pack 192 GB or more into a single server without sacrificing speed. The 1866 MHz clock and CL13 latency supply the low-latency bandwidth that real-time analytics demand, ensuring sub-millisecond query responses under heavy concurrency. Every feature works together to protect your data, maximize platform scalability, and keep mission-critical services running flawlessly around the clock.

Endurance & Reliability

General Virtualization
For consolidated virtualization hosts running multiple VMs, capacity per channel is critical. Populate at least four identical M386B4G70DM0-CMA4Q modules across four channels to achieve 128 GB of registered ECC memory, ensuring stable overcommit ratios. This quad-rank RDIMM configuration maximizes density while keeping voltage at 1.5 V for reliable 24/7 operation under mixed workloads.

In-Memory Database
In-memory databases like Redis or SAP HANA demand low latency and absolute data integrity. Deploy six to eight modules on a dual-socket server to reach 192–256 GB, using balanced interleaving for maximum bandwidth. The ECC and registered signaling of this DDR3-1866 RDIMM guard against single-bit errors, which is non-negotiable for transactional consistency.

High-Performance Computing
HPC clusters benefit from high memory bandwidth per node. Install one module per channel across all available memory channels to leverage the full 1866 MT/s speed. Quad-rank x4 organization provides deep bank interleaving, improving sustained throughput for MPI-based simulations. The 1.5 V operating envelope also helps control thermals in dense rack environments, allowing stable long-duration compute jobs.

Verified Compatibility

Rigorously tested server memory, compatible with Dell PowerEdge R720, HP ProLiant DL380p Gen8, and Lenovo ThinkServer RD430.

FAQ