General

Engineer's Note

This Samsung M393B1K70DH0-YH9-ER3 is an 8GB DDR3-1333 registered ECC RDIMM operating at 1.35V, purpose-built for legacy server platforms where data integrity and stability are paramount. Its dual-rank x4 organization with registered signaling and ECC makes it ideally suited for virtualization hosts and memory-intensive database applications that demand reliable, error-corrected operation under heavy, sustained loads.

Technical Specs & Insights

1. ECC error correction actively detects and corrects single-bit errors, preserving data integrity in long-running virtualization and critical database operations.
2. Registered signal buffering stabilizes command and address lines, enabling populated multi-DIMM configurations without jeopardizing signal quality under heavy server loads.
3. 1.35V low-voltage operation curbs per-module power consumption, directly lowering energy and cooling expenses in dense rack deployments.
4. Dual Rank x4 organization interleaves memory accesses across internal banks, delivering sustained throughput for memory-intensive enterprise workloads like in-memory analytics.
5. 8GB capacity per module strikes a flexible building block, letting IT fine-tune total memory to match diverse container and host density without overspending on unused resources.

Why These Specs Matter

The M393B1K70DH0-YH9-ER3 is a server-grade DDR3 Registered DIMM, purpose-built for data centers where uptime and accuracy are non-negotiable. In a dense virtualization cluster running dozens of VMs on a single host, a single undetected bit flip in memory can silently corrupt guest OS files or database records, leading to catastrophic cascading failures. This module’s ECC engine continuously detects and corrects single-bit errors, converting a potential outage into a transparent, logged correction, which is critical when you are hosting revenue-sensitive customer databases or ERP systems. Meanwhile, the Registered signal architecture buffers the command and address lines, stabilizing the memory bus as you populate multiple DIMMs per channel. That means you can fill all 24 slots on a dual-socket server without signal degradation, maximizing capacity for an in-memory database like SAP HANA that demands terabytes of fault-free RAM. At 1.35V, the low-voltage operation cuts thermal footprint in tightly packed racks, directly lowering cooling power consumption. The dual-rank x4 organization then boosts throughput by enabling rank-level interleaving: while one rank refreshes or processes a command, the other stays active, delivering sustained bandwidth during the bursty, concurrent reads inherent to transactional databases. Together, these four features translate directly to fewer midnight pages, predictable latency under load, and a lower total cost of ownership for your virtual infrastructure.

Endurance & Reliability

The M393B1K70DH0-YH9-ER3 is a server-focused 8 GB DDR3-1333 Registered ECC RDIMM (1.35V dual-rank). Capacity planning guidance:

General Virtualization
For general virtualization, install at least one DIMM per memory channel to enable interleaving. A dual-socket host with three channels per CPU can hold 6 to 12 of these modules (48–96 GB), providing sufficient capacity for dozens of moderate VMs. Always populate matching modules for optimal ECC and stability.

In-Memory Database
In-memory databases require maximum RAM. Fully populate all available slots, targeting 24 or more modules (192 GB+) to host entire datasets. The registered architecture and dual-rank design ensure signal integrity even at high density, while 1.35V operation lowers energy costs.

High-Performance Computing (HPC)
For bandwidth-sensitive HPC, install exactly one DIMM per channel to activate all memory controllers—commonly 8 or 12 modules (64–96 GB). The dual-rank x4 configuration delivers higher effective bandwidth than single-rank, and ECC prevents silent data errors during extended simulations.

Verified Compatibility

Rigorously validated for Dell PowerEdge R720, HP ProLiant DL380p Gen8, and similar servers.

FAQ