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Samsung M395T5663FB4-CE68 2G DDR2 FBDIMM 667MT/s | Reliable ECC

MPN:M395T5663FB4-CE68 By:Samsung Warranty:1 year
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General

ModelM395T5663FB4-CE68
Product TypeMemory Module
Compliance StandardsEU RoHS,FCC
Memory Capacity2 GB
Memory TechnologyDDR2
Product Voltage1.8V
RAM Speed667MHz
RAM StandardDDR2-667/PC2-5300
Error IdentifyingECC
Signal TypeFully Buffered
Column Access Strobe (CAS)CL5
RankDual Rank x8
Quantity of Pins240-pin
RAM GenreFB-DIMM

Engineer's Note

This 2GB DDR2-667 FB-DIMM is engineered for legacy server platforms and is ideally suited for memory-intensive workloads such as virtualization and in-memory databases where the integrated ECC and fully buffered architecture deliver critical data integrity and signal stability. The dual-rank x8 design with CL5 latency leverages interleaved bank access to sustain high throughput, while the point-to-point buffering scheme ensures reliable operation across fully populated memory channels.

Technical Specs & Insights

1. ECC error correction silently detects and repairs single-bit memory errors, preserving data integrity in always-on financial transaction servers.
2. Fully Buffered architecture isolates the memory bus from the controller, allowing fully populated channels without signal weakening in high-density virtualization hosts.
3. Dual Rank x8 organization interleaves accesses across internal banks, boosting effective throughput for simultaneous workload consolidation.
4. 667 MHz operating speed supplies steady mid-tier bandwidth, keeping latency predictable for enterprise database queries under constant load.
5. DDR2 technology runs at a low 1.8V voltage, reducing power draw and cooling demands inside densely packed rack enclosures over extended uptime cycles.

Why These Specs Matter

The M395T5663FB4-CE68 is a server-grade Fully Buffered DIMM, purpose-built to eliminate the critical pain points of enterprise computing. Its Fully Buffered architecture employs an Advanced Memory Buffer to isolate electrical loads, allowing you to populate all slots without signal degradation—essential for dense virtualization clusters where 2GB modules can be scaled to deliver stable memory capacity for dozens of virtual machines without intermittent crashes. The integrated ECC circuitry provides real-time error correction, preventing single-bit data corruption from background radiation that could cause silent data loss in transaction-heavy databases like MySQL or in-memory caching systems. Built as a Dual Rank x8 module, it enables bank interleaving that boosts effective bandwidth during concurrent access requests; this directly accelerates memory database lookups and multi-tenant workloads under heavy query pressure. With a 240-pin FB-DIMM form factor, 667MHz speed at CL5, and 1.8V operation, this module delivers rock-solid compatibility with legacy server platforms, ensuring your mission-critical ERP and financial systems stay online without memory-related integrity failures. For IT managers, it means guaranteed uptime and transactional accuracy when every bit counts.

Endurance & Reliability

The Samsung M395T5663FB4-CE68 is a 2 GB DDR2-667 Fully Buffered DIMM (FB-DIMM) with ECC, designed for legacy server platforms. Capacity planning with these modules must respect their low density, modest bandwidth, and reliance on serial memory architecture.

General Virtualization
For lightweight VM hosting, start with 8 GB (four modules) to support a handful of virtual machines. A balanced 16 GB configuration (eight modules) using dual-rank interleaving across all memory channels delivers improved bandwidth and fault tolerance. Enable memory sparing or mirroring in the BIOS if supported to protect against DIMM failures.

In-Memory Database
In-memory databases hunger for capacity and reliability. Populate every available DIMM slot—aim for 32 GB or more when the board allows—to maximize dataset residency. Configure fully interleaved memory across all riser cards and memory buffers to minimize latency under heavy transactional loads, and rely on ECC to guard against data corruption.

High Performance Computing
HPC clusters need sustained memory throughput. Symmetrically fill all channels with identical modules to achieve the widest interleaving possible. Although 667 MHz limits peak bandwidth, aggregating 16–32 GB across many FB-DIMMs in a NUMA-aware layout can still adequately feed older compute nodes. Never mix ranks or speeds to avoid timing instability.

Verified Compatibility

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

FAQ

Q: Can I mix this M395T5663FB4-CE68 with other memory modules of different brands or speeds?

A: Mixing FB-DIMMs of different brands or speeds is not recommended. It may cause system instability or fail to boot due to stringent signal timing requirements in fully buffered server environments.

Q: Is this memory compatible with my system?

A: This module requires a server platform with a chipset supporting Fully Buffered DDR2, such as Intel 5000/5400 series. Verify FB-DIMM support before purchase.

Q: What is the recommended DIMM population order for optimal performance?

A: Populate FB-DIMMs in matched pairs per channel, following your server board manual. Typically, you should fill the farthest slots from the processor first for proper cooling and signal integrity.

Q: Does this module support overclocking or XMP profiles?

A: No. This is a server-grade FB-DIMM built for stability. It does not support overclocking, XMP, or voltage adjustment, strictly adhering to JEDEC DDR2-667 specifications.

Q: What warranty and typical failure rate can I expect?

A: This module includes a one-year warranty. As an ECC FB-DIMM engineered for 24/7 operation, it delivers very low annualized failure rates under normal server conditions.

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