General

Engineer's Note

Designed for legacy server platforms, this 2GB DDR2-667 Registered DIMM with ECC ensures data integrity for mission-critical workloads like lightweight virtualization or embedded database applications. The dual-rank configuration and registered signaling enhance signal stability in multi-module configurations, making it suitable for older systems that demand reliable, error-corrected memory.

Technical Specs & Insights

1. ECC protection detects and corrects single-bit errors in real time, preventing silent data corruption in transactional databases and ensuring the long-term accuracy of financial and healthcare records.
2. Registered signal buffering decouples the memory controller from heavy DRAM loads, allowing up to three or more modules per channel without sacrificing signal integrity in densely packed server nodes.
3. Dual Rank x4 organization interleaves accesses across two internal rank groups and uses narrow x4 DRAMs, maximizing channel utilization for steady virtual machine throughput while strengthening error isolation per DRAM device.
4. A 2 GB capacity targets lightweight, always-on infrastructure services such as DNS proxies, domain controllers, or edge routers where predictable latency and uptime outweigh the need for massive working sets.
5. The 667 MHz clock rate yields a peak transfer bandwidth of 5.3 GB/s per module, matching the steady streaming needs of basic file servers, print services, and moderate-traffic web applications without oversubscribing the memory fabric.

Why These Specs Matter

When you are responsible for a virtualization cluster or an in-memory database, the memory you choose directly determines whether your workloads survive the next cosmic ray or degrade under heavy simultaneous access. The Micron MT36HTF25672PY-667D1 is an RDIMM server module built for that reality, and its four defining characteristics translate directly into uptime and predictable performance.

Its ECC engine means single-bit errors get corrected on the fly, preventing silent data corruption that could crash a hypervisor or poison a financial transaction journal. The registered signal buffer isolates the memory controller from excessive electrical load, so you can populate all channels in a 2U database server without the signal integrity collapse that forces a bare-metal reboot at 3 a.m. Dual rank x4 organization interleaves access across ranks, delivering measurably higher sustained bandwidth for a hypervisor hosting dozens of VMs that each hammer memory simultaneously; a single-rank DIMM would choke here. And because this is a DDR2-667 module running at a standard 1.8 volts, it slots into legacy appliance servers and industrial controllers where newer, lower-voltage memory simply will not POST, letting you extend service life and compliance scope without a costly platform refresh. For your virtualized SQL Server cluster or your rack of telephony appliances, these specs are not features on a datasheet—they are the reason you wake up to a green dashboard instead of a pager alert.

Endurance & Reliability

General Virtualization
This 2GB DDR2-667 Registered ECC module is suited for older hypervisor hosts running light to moderate VM densities. In small-scale virtualization labs, populate six to eight of these modules per socket to reach 12–16 GB, which allows a handful of low-resource VMs. Always install in identical sets to maintain ECC integrity and symmetrical memory interleaving across channels.

In-Memory Database
For in-memory workloads like Redis or Memcached on legacy platforms, maximum capacity is critical. Fill all available DIMM slots with these 2GB dual-rank RDIMMs to achieve the highest possible RAM footprint, often 32–64 GB on dual-socket servers. The registered ECC design ensures data consistency during aggressive in-memory operations, although a migration to newer DDR4/DDR5 platforms is recommended for production.

High-Performance Computing
In HPC clusters using older nodes, balanced memory bandwidth per core is essential. Deploy eight identical modules per dual-socket node to populate all channels and achieve a uniform 16 GB capacity, reducing NUMA latency penalties. Pair every memory channel with the same RDIMM to sustain peak throughput, and avoid mixing single-rank and dual-rank DIMMs to prevent channel performance mismatches.

Verified Compatibility

This server memory is rigorously tested and compatible with Dell PowerEdge 2950, HP DL380 G5, IBM x3650.

FAQ