General

Engineer's Note

This RDIMM with Registered ECC and 1.35V ultra‑low voltage is purpose‑built for virtualization and memory‑intensive server workloads such as in‑memory databases, where its Dual Rank x4 organization maximizes capacity per channel and sustained bandwidth efficiency. The CL11 latency at DDR3‑1600 combined with registered signal integrity scaling ensures reliable data integrity and stable operation across fully populated server boards even under heavy, continuous computational loads.

Technical Specs & Insights

1. ECC error correction detects and corrects single-bit memory faults in real time, preserving data integrity for financial transactions and mission-critical databases that cannot tolerate silent corruption.
2. Registered signal buffering amplifies command and address lines, maintaining signal stability across fully loaded channels and allowing high-capacity server configurations without compromising reliability.
3. Dual Rank x4 organization leverages bank interleaving to keep data streams continuous, boosting effective memory bandwidth for virtualized clusters and heavy consolidation workloads.
4. Low 1.35V operation cuts overall power consumption and thermal output in dense rack environments, lowering cooling overhead and improving total cost of ownership for scaled-out data centers.
5. An 8GB module density provides a balanced capacity that maximizes the number of lightweight containers or VMs per host while preserving room for future memory expansion.

Why These Specs Matter

Designed as a registered DDR3 module with ECC, this M393B1K70PH0-YK009 RDIMM is purpose-built for server environments where uptime and data accuracy are non-negotiable. Its ECC capability provides single-bit error correction and multi-bit detection, directly protecting your memory database or virtualization host against silent data corruption caused by cosmic ray bit flips—an invisible risk that can crash transactions or corrupt in-memory analytics over time. The registered architecture with an onboard buffer decouples the memory bus from the system’s memory controller, significantly improving signal integrity. For a virtualization cluster packing 384GB or more across multiple DIMMs per channel, this means stable operation under heavy load without boot failures or random kernel panics that plague unbuffered modules in high-density configurations. The dual-rank x4 organization lets the memory controller interleave access across internal banks, extracting more bandwidth under concurrent workloads—critical when dozens of virtual machines or a large Redis instance issue overlapping I/O requests. Finally, operating at 1.35V instead of 1.5V, this low-voltage DDR3L module reduces power consumption and thermal output per DIMM. In a rack filled with dozens of nodes, that delta translates into meaningful savings on cooling overhead and electricity costs, while maintaining full 1600MT/s speed for responsive data processing day after day.

Endurance & Reliability

General Virtualization
For general virtualization hosts, balanced capacity and memory bandwidth are critical. Populating at least six to twelve 8GB RDIMMs per CPU socket yields 48GB–96GB, which comfortably supports 20–40 typical virtual machines. Distribute modules evenly across all memory channels (e.g., six identical DIMMs for a triple-channel platform) to maximize bandwidth and maintain registered ECC reliability under mixed workloads.

In-Memory Database
In-memory databases demand low latency and high availability. Deploy the maximum supported DIMMs per server, often 24 modules across two sockets, to reach 192GB or more while preserving interleaving. Configure modules as mirrored or sparing pairs when the platform supports it, and favour 1.35V RDIMMs to reduce thermals—critical for sustained large-dataset operations where CAS 11 latency is consistent and predictable.

High-Performance Computing
HPC clusters require maximum aggregated bandwidth and minimal power draw per node. Populate all memory channels with a single identical 8GB RDIMM per channel, yielding moderate capacity (e.g., 64GB on an 8-channel system) but peak bandwidth. Opt for dual-rank x4 modules to exploit rank interleaving, and leverage the 1.35V operating voltage for denser deployments, lowering cooling costs while maintaining 1600 MT/s throughput under heavy computational loads.

Verified Compatibility

Verified compatible; rigorously tested with Dell PowerEdge R720, HP ProLiant DL380p Gen8, IBM x3650 M4.

FAQ