General

Engineer's Note

This FB-DIMM module is server-grade memory, optimized for legacy enterprise platforms running memory-intensive workloads such as virtualization and in-memory databases. Its Fully Buffered architecture with ECC and Dual Rank x4 organization ensures robust signal integrity and data reliability under high-capacity configurations, making it ideally suited for mission-critical servers that demand stable, error-corrected operation.

Technical Specs & Insights

1. Fully Buffered signal type decouples the memory bus from electrical loading, enabling high-density DIMM populations that keep large-scale virtualization hosts stable under maximum consolidation.
2. ECC error correction continuously scans and repairs single-bit faults, preserving transactional data accuracy for mission-critical database engines around the clock.
3. A 2GB capacity per module supplies ample headroom for legacy enterprise hypervisors, allowing more concurrent virtual machines without costly hardware swaps.
4. The 667MHz clock rate provides predictable throughput for line-of-business applications, ensuring steady session responsiveness under sustained user concurrency.
5. Dual Rank x4 organization interleaves accesses across internal banks, sustaining channel bandwidth so virtualized workloads avoid frame drops and I/O bottlenecks.

Why These Specs Matter

The M395T5750EZ4-CE66 is a server-grade DDR2-667 FB-DIMM engineered for legacy enterprise environments where rock‑solid uptime and data integrity are non‑negotiable. Its defining four characteristics directly address the daily struggles of IT infrastructure managers.

Every read and write is protected by ECC. In a dense virtualization cluster, a single undetected bit flip in a DRAM cell can silently corrupt a running virtual machine’s kernel tables, forcing a costly failover or data rollback. ECC catches and corrects these errors before they cascade, offering you a last line of defense against in‑memory faults that would otherwise threaten service continuity.

The Fully Buffered architecture uses an Advanced Memory Buffer chip that decouples the DRAM from the memory bus. For a memory‑resident database like an in‑memory cache or a transactional SQL engine, this means you can populate dual‑socket servers with far more DIMM slots without signal degradation, converting spare I/O bays into a larger, faster query cache that reduces disk I/O and latencies under peak loads.

Meanwhile, the Dual Rank x4 organization interleaves two independent sets of memory banks on a single stick. In a hypervisor hosting dozens of VMs, simultaneous memory requests from multiple guests no longer queue up behind a single rank. This parallel access scheme boosts effective bandwidth and reduces critical fetch‑to‑usage delays, directly translating into snappier database compactions and faster live migration times.

Finally, the standardized 1.8V power profile and 240‑pin FB‑DIMM form factor guarantee drop‑in compatibility with legacy server boards, allowing you to extend the life of a validated platform. When your business runs on a hardened software stack that has been certified for stability, this module keeps your memory footprint scalable without reshaping the entire hardware ecosystem—nothing matters more than proven reliability.

Endurance & Reliability

The M395T5750EZ4-CE66 is a 2GB DDR2-667 ECC Fully Buffered DIMM for legacy servers.

General Virtualization
Populate memory channels identically with these 2GB FB-DIMMs to enable interleaving and ECC reliability for multiple VMs. A practical start is eight modules (16GB) across two risers, which supports a handful of light guests. To increase density, fill all 16 or more available slots to reach 32GB and allocate more memory per virtual machine.

In-Memory Database
Maximise capacity by using every DIMM slot the board offers—target 16 or 32 modules to achieve 32–64GB. Keep all modules identical dual-rank FB-DIMMs to maintain uniform access latency, which is critical when holding entire datasets in RAM. If the 64GB ceiling is insufficient, plan for a multi-node deployment.

High-Performance Computing
Deliver full memory bandwidth by installing these dual-rank DIMMs in matched sets across all channels (four modules for a quad-channel platform). Populate the maximum number of slots per channel to sustain peak throughput for parallel jobs. Per-node capacity will be limited to roughly 32–64GB, so scale across multiple compute nodes as needed.

Verified Compatibility

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

FAQ