General

Engineer's Note

This is a server-class DDR2 Fully Buffered DIMM (FB-DIMM) equipped with ECC, specifically engineered for legacy enterprise servers and high-availability platforms running memory-intensive workloads like virtualization or in-memory databases. Its fully buffered architecture enhances signal integrity and supports high-density configurations, while the dual-rank x4 organization and ECC deliver robust data reliability and reduced memory access latency under sustained load.

Technical Specs & Insights

1. Fully Buffered architecture isolates the memory controller from electrical loading, enabling large-scale server deployments with unmatched signal integrity and capacity headroom.
2. ECC protection detects and corrects single-bit errors in real time, safeguarding transactional databases and financial computations against silent data corruption.
3. Eight-gigabyte capacity per module supports dense virtualization hosts, allowing more virtual machines per physical server without sacrificing memory performance.
4. Dual Rank x4 organization leverages bank interleaving to boost throughput, essential for sustaining heavy multi-threaded workloads in enterprise environments.
5. 667 MHz clock speed delivers the steady bandwidth required for legacy server platforms, balancing power efficiency with reliable data throughput under sustained load.

Why These Specs Matter

The MT36HTS1G72FY-667A1D4 is a server-class FB-DIMM engineered for mission-critical enterprise workloads, where conventional desktop memory simply cannot deliver the required resilience. Its defining characteristics translate directly into uptime, data fidelity, and predictable performance.

First, ECC and the fully buffered architecture work in tandem to safeguard data integrity at scale. In a virtualized cluster running a dozen guest machines on a single host, a single undetected bit flip in memory can corrupt a database or cascade into a system crash. ECC corrects single-bit errors in real time, while the Advanced Memory Buffer on each FB-DIMM decouples the electrical load from the memory channel. This lets you populate all 240 pins across multiple slots without signal degradation, giving your hypervisor the stable, high-density footprint it demands for consolidating mixed workloads.

Second, the dual-rank x4 organization and 8 GB capacity directly address the latency and bandwidth bottlenecks of in-memory databases like Redis or SAP HANA. Dual rank allows interleaved access, overlapping precharge cycles to keep the 667 MHz data path saturated, which lowers effective latency under concurrent query storms. When your caching tier must answer millions of transactions per second, that means consistent sub-millisecond response times without stalling. For a data center operator, combining ECC, FB-DIMM buffering, and dual-rank density on this module means deploying fewer servers to meet the same capacity target, reducing both power draw and licensing costs while avoiding the silent corruption that erodes customer trust.

Endurance & Reliability

General Virtualization
For general virtualization hosts using FB-DIMM DDR2-667 platforms, populate all memory channels symmetrically to maximize available bandwidth. A typical dual-socket server with 8 or 16 DIMM slots can be equipped with 8 GB modules to reach 64–128 GB, supporting moderate VM density for light to medium workloads. Always install modules in identical pairs or sets to maintain ECC and mirroring stability across NUMA nodes.

In-Memory Database
In-memory databases demand maximum capacity and fault tolerance, making 8 GB ECC FB-DIMMs a basic building block. Fully populate each memory riser or branch with dual-rank x4 modules to achieve the highest supported RAM, often 256 GB or more, while relying on ECC and sparing features to protect data integrity. Configure memory sparing or mirroring where latency sensitivity allows, and balance load across all available memory controllers.

High-Performance Computing
HPC clusters on aging DDR2 platforms can still benefit from fully buffered memory’s reliability in large node counts. Use identical 8 GB DIMMs across all nodes, populating every channel equally to sustain consistent memory bandwidth for MPI workloads. For memory-bandwidth-bound simulations, interleave all ranks and set BIOS options to optimize for streaming or NUMA-aware placement, ensuring minimal performance variation across the cluster.

Verified Compatibility

Rigorously tested server FB-DIMM; compatible with Dell PowerEdge 2900/1950/2950, HP ProLiant DL380 G5, IBM x3650.

FAQ