General

Engineer's Note

Designed for server-class platforms, this Samsung M386B4G70DM0-CMA30 32 GB DDR3-1866 RDIMM leverages registered signaling and ECC to ensure data integrity in high-density virtualization, memory-intensive databases, and reliable cloud workloads. Its quad-rank x4 configuration and CL13 latency deliver stable, high-capacity throughput under sustained load, making it an optimal choice for mission-critical enterprise servers requiring maximum memory capacity per channel.

Technical Specs & Insights

1. The module’s substantial density enables expansive memory footprints per server, directly raising virtual machine consolidation ratios and speeding up large in-memory workloads.
2. ECC functionality automatically detects and repairs single-bit errors, delivering rock-solid data reliability for transaction processing and critical business analytics.
3. Registered buffering re-drives command and address lines across multiple DIMM slots, preserving signal integrity and enabling trouble-free operation in fully populated enterprise platforms.
4. Quad Rank x4 organization interleaves multiple internal banks, keeping memory channels fully saturated to sustain consistent throughput under heavy multi-tenant virtualization.
5. High data rate operation provides elevated memory bandwidth, reducing access latency in data-intensive scenarios such as real-time caching and high-concurrency database queries.

Why These Specs Matter

The M386B4G70DM0-CMA30 is a 32GB DDR3-1866 Registered DIMM, purpose-built for server environments where uptime and data integrity are non-negotiable. Its ECC technology is your first line of defense against silent data corruption: in a virtualized cluster running dozens of VMs, a single-bit error in memory could cascade into unpredictable application crashes or data loss. ECC detects and corrects these errors in real time, keeping your hypervisor stable and your SLAs intact. The registered design buffers command and address signals, which means you can populate all 24 memory slots on a dual-socket server without signal degradation. For a memory database like Redis or SAP HANA, that translates to 768GB or more of reliable capacity, allowing the entire dataset to reside in RAM for sub-millisecond transactions, rather than spilling to slow storage. The quad-rank x4 organization further enables high-density configurations while maintaining balanced load on the memory controller, critical when multiple VMs are hammering the I/O subsystem simultaneously. At 1866MHz with CL13 latency, this module delivers the bandwidth needed for heavy in-memory analytics, ensuring that your CPU pipelines are fed continuously even under full load. Together, these four characteristics turn a simple memory purchase into a foundation for server consolidation, business continuity, and real-time decision-making.

Endurance & Reliability

General Virtualization
For general virtualization hosts, balance memory capacity and cost by populating all memory channels evenly. A typical dual-socket server with this 32 GB DDR3-1866 RDIMM benefits from six or eight identical modules (192–256 GB total) to maximize memory bandwidth and support moderate VM density. Deploying modules in matched sets avoids performance penalties and ensures Registered ECC reliability for multi-tenant workloads.

In-Memory Database
In-memory databases demand maximum capacity and fault tolerance. Fully populate each memory channel with these quad-rank 32 GB RDIMMs—up to 24 modules in a dual-socket system for 768 GB—to keep entire datasets resident. Use identical part numbers across all banks to maintain signal integrity; even slight mismatches can trigger correctable errors under the sustained high throughput typical of Redis or SAP HANA.

High-Performance Computing (HPC)
HPC clusters favor bandwidth-sensitive configurations. Install one DIMM per channel (1DPC) at the highest supported speed to avoid the downgrade to 800 MHz that often occurs with quad-rank modules in multi-DIMM setups. For capacity-bound simulations, a balanced 2DPC approach with 32 GB RDIMMs supplies 128–256 GB per node while preserving enough memory bandwidth for MPI-parallel scientific codes.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge R720, HP ProLiant DL380p Gen8, IBM System x3650 M4.

FAQ