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| Model | M386B4G70BM0-CMA3Q |
|---|---|
| Product Type | Memory Module |
| Compliance Standards | CE,WEEE,RoHS |
| Memory Capacity | 32 GB |
| Memory Technology | DDR3 |
| Product Voltage | 1.5V |
| RAM Speed | 1866MHz |
| RAM Standard | DDR3-1866/PC3-14900 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL13 |
| Rank | Quad Rank x4 |
| Quantity of Pins | 240-pin |
| RAM Genre | RDIMM |
Designed specifically for dual-socket server platforms, this Samsung 32 GB DDR3-1866 RDIMM (M386B4G70BM0-CMA3Q) is built to handle memory-intensive virtualization and in-memory database workloads. Its registered signal architecture and quad-rank x4 organization maximize per-channel capacity and data integrity for large-scale deployments, while the CL13 latency at 1866 MHz delivers a balance of throughput and responsiveness in legacy enterprise environments.
1. ECC technology actively corrects single-bit memory errors, eliminating silent data corruption risks that threaten financial ledgers and hypervisor integrity in always-on servers.
2. The register driver stabilizes command and address signals, enabling fully populated memory channels to scale reliably for dense multi-socket virtualization platforms.
3. Quad rank x4 organization maximizes per-DIMM capacity, allowing memory-intensive in-memory databases to cache massive datasets without pushing critical pages into high-latency storage.
4. High memory bandwidth feeds modern multi-core server processors, accelerating parallel data analytics and high-frequency transaction processing under sustained load.
5. A large per-module capacity reduces slot count requirements, packing more virtual machines onto a single node and lowering the total cost per guest in cloud deployments.
The M386B4G70BM0-CMA3Q is a server-class Registered DIMM engineered for enterprise workloads where downtime is not an option. Its defining characteristics directly address the most pressing data center pain points.
First, ECC technology continuously detects and corrects single-bit memory errors, which can be caused by background radiation. In a virtualized cluster running dozens of VMs on a single host, one undetected bit flip can silently corrupt a virtual disk or crash the entire hypervisor. ECC eliminates that risk, safeguarding system uptime. Second, the registered signal buffer allows the memory controller to drive this high-density 32GB Quad Rank module reliably, even when all memory channels are fully populated. For an in-memory database like Redis or SAP HANA, this means you can scale to massive capacities without sacrificing electrical stability or encountering boot failures that plague unbuffered designs.
Third, the Quad Rank x4 configuration packs more DRAM banks onto the PCB, maximizing memory density per slot. This is crucial when fitting terabytes of RAM into a 1U server with limited DIMM sockets. Finally, the DDR3-1866 speed and CL13 latency deliver the bandwidth needed to keep pace with multi-core processors, ensuring that real-time analytics queries return insights at the speed of memory, not disk. For your virtual infrastructure, this translates directly into higher consolidation ratios and a truly responsive user experience.
Based on the specifications — DDR3, ECC Registered, 240-pin RDIMM — this is unequivocally server memory. The 32GB quad-rank module is designed for enterprise-class stability and large memory footprints. Below is the capacity planning guidance for typical server workloads.
General Virtualization
Virtualized hosts thrive on memory density and reliability. Deploy these 32GB RDIMMs in balanced configurations, typically populating two DIMMs per channel to strike a favorable speed–capacity balance. Aim for a minimum of 128GB per CPU (four modules) to comfortably host dozens of VMs without resorting to ballooning or swapping.
In-Memory Database
In-memory databases demand sheer volume and fault tolerance. Maximize capacity by fully populating all channels, but be aware that using multiple quad-rank DIMMs per channel can force a speed downgrade. For a dual-socket server, installing 16 to 24 modules (512–768GB) creates a resilient, low-latency dataset while leveraging ECC to protect against bit errors.
High Performance Computing
HPC favors bandwidth-sensitive, highly parallel access. To sustain the full 1866MT/s speed, limit population to one quad-rank DIMM per channel. A typical dense compute node can scale to 256GB (eight modules per server) with uncompromised data rates, matching the fast iterative I/O patterns of modeling and simulation codes.
Rigorously tested server memory, compatible with Dell PowerEdge R720, HP ProLiant DL380p Gen8, Lenovo System x3650 M4, and more.
Q: Can I mix this M386B4G70BM0-CMA3Q with other memory modules of different brands or speeds?
A: Mixing is not recommended. Registered ECC modules require identical specifications for stable server operation. Mismatched ranks, speeds, or vendors may cause POST failures or memory errors.
Q: Is this memory compatible with my system?
A: It fits servers using Intel Xeon E5-2600 v2 or AMD Opteron 6300 series platforms with DDR3-1866 Registered ECC support. Verify your board’s qualified vendor list for this 32GB Quad Rank RDIMM.
Q: What is the recommended DIMM population order for optimal performance?
A: Populate identical modules per channel, starting with slot 1 (blue/black connector) on each memory riser. On 4-channel platforms, balance Quad Rank modules to avoid speed downclocking below 1866MT/s.
Q: Does this module support overclocking or XMP profiles?
A: No. This is a JEDEC-compliant server RDIMM operating at fixed 1866MHz CL13. It does not support XMP or user overclocking; stability and data integrity take priority over frequency tuning.
Q: What warranty and typical failure rate can I expect?
A: This module includes a one-year warranty. It is built with Samsung enterprise-grade components, delivering an AFR well under 0.5% under proper thermal conditions in 24/7 operation.