General

Engineer's Note

Designed as a high-capacity Registered DDR3 server module, the M386B8G70BO0-YH9 is purpose-built for virtualization platforms, in-memory databases, and enterprise workloads demanding uncompromising data integrity. Its octal-rank x4 configuration combined with ECC and a low CL9 latency ensures stable signal integrity and efficient error correction at 1.35V, maximizing memory density and reliability in dense multi-socket deployments.

Technical Specs & Insights

1. 64 GB capacity per module allows dense virtualization footprints, enabling more VMs and larger in-memory databases in a single server without sacrificing performance.
2. ECC protection continuously corrects single-bit errors and detects multi-bit faults, preserving data integrity for financial transactions and long-running analytics workloads.
3. Registered signal buffering stabilizes command and address lines under heavy loads, ensuring reliable operation when all DIMM slots are populated in multi-socket platforms.
4. Octal Rank x4 organization crams the maximum logical ranks into one module, maximizing memory density for scale-up applications while predictable server memory controllers handle the scheduling trade-off.
5. 1.35 V low-voltage operation trims datacenter power draw and reduces cooling overhead, directly lowering total cost of ownership in dense rack deployments.

Why These Specs Matter

Designed for mission-critical servers, the M386B8G70BO0-YH9 is a 64GB DDR3 Registered DIMM that tackles the real demands of enterprise computing. Its ECC technology continuously detects and corrects single-bit memory errors, eliminating silent data corruption that could crash a virtualized cluster or poison financial transaction logs overnight. The registered signal buffer stabilizes the massive 64GB capacity across densely populated server boards, allowing you to populate all channels without timing degradation. This reliability directly translates to longer uptime for your hypervisor host running dozens of virtual machines. Meanwhile, the octal-rank x4 organization gives memory controllers efficient parallelism, sustaining high bandwidth even under the random access patterns of an in-memory database. When your Redis or SAP HANA instance serves millions of queries per second, the higher rank count keeps latency low and throughput steady. Lastly, operating at 1.35V reduces thermal load in a packed rack, cutting datacenter cooling costs while maintaining 1333MHz speed. For your virtualized infrastructure and real-time analytics, this module delivers the error-free, high-density stability that turns complex workloads into routine operations.

Endurance & Reliability

Memory Type Identification
The M386B8G70BO0-YH9 is a server-grade DDR3 Registered ECC RDIMM (64GB, Octal Rank x4). It is designed exclusively for enterprise servers and cannot be used in desktop or laptop platforms.

General Virtualization
Deploy one 64GB DIMM per memory channel to maintain the full 1333 MHz frequency while achieving high density. In a dual-socket server with eight channels this yields 512 GB, comfortably supporting 40–50 typical VMs. Avoid populating more than two of these Octal Rank modules per channel, as the increased loading forces a speed downgrade to 1066 MHz or lower.

In-Memory Database
Maximize capacity by fully populating all DIMM slots, but expect a trade-off: installing two such high-rank DIMMs per channel typically drops the operating speed to 1066 MHz. Accept this compromise when reaching terabyte-scale capacity is critical, or use one DIMM per channel if latency must stay at CL9-1333. Always match identical modules across channels to maintain reliability.

High-Performance Computing (HPC)
HPC workloads are bandwidth-sensitive; install one 64 GB RDIMM per channel to preserve 1333 MHz and enable balanced channel interleaving. An 8-DIMM configuration across a dual-socket system delivers 512 GB of high-throughput memory, ideal for simulation and parallel I/O. Never mix ranks or capacities to avoid asymmetric performance degradation.

Verified Compatibility

Rigorously tested server memory, compatible with Dell PowerEdge R720, HP ProLiant DL380p Gen8, and similar platforms.

FAQ