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| Model | M395T2953EZ4-CE66 |
|---|---|
| Product Type | Memory Module |
| Compliance Standards | EU RoHS,FCC |
| Memory Capacity | 1 GB |
| Memory Technology | DDR2 |
| Product Voltage | 1.8V |
| RAM Speed | 667MHz |
| RAM Standard | DDR2-667/PC2-5300 |
| Error Identifying | ECC |
| Signal Type | Fully Buffered |
| Column Access Strobe (CAS) | CL5 |
| Rank | Dual Rank x8 |
| Quantity of Pins | 240-pin |
| RAM Genre | FB-DIMM |
This is a server-grade memory module featuring Fully Buffered DIMM architecture with ECC, delivering the high data integrity and advanced signal buffering essential for memory-intensive enterprise workloads such as virtualization and in-memory databases. Its dual-rank x8 organization combined with CL5 latency optimizes memory bandwidth utilization on legacy DDR2-667 platforms, ensuring stable multi-DIMM operation in dense server configurations.
1. Fully Buffered signaling architecture drives higher memory capacity per channel while preserving signal clarity across fully populated server nodes.
2. Integrated ECC scrubs bit errors on the fly, vital for upholding long-running computations and safeguarding financial transaction records.
3. Dual Rank x8 design leverages bank interleaving to maximize effective bandwidth, directly benefiting hosted virtual desktop performance under peak loads.
4. The specified frequency affords ample throughput for legacy enterprise platforms, maintaining stable operation of aging but critical infrastructure.
5. Tight Column Access Strobe latency curtails memory access delays, enabling swifter data retrieval for high-concurrency database engines.
The M395T2953EZ4-CE66 is a server-grade DDR2 Fully Buffered DIMM engineered for virtualized clusters and in-memory databases. Its four defining characteristics—ECC, a Fully Buffered topology, dual-rank x8 layout, and CL5 latency—deliver tangible business resilience. ECC corrects cosmic-ray bit-flips on the fly, preventing a single soft error from crashing a hypervisor or corrupting a database record. The Fully Buffered architecture uses an AMB to serialize signals, enabling a fully populated node to exceed 128 GB with pristine signal quality—essential for high-density VM hosting. The dual-rank layout interleaves bank accesses to hide precharge gaps, nearly doubling the 667 MHz bus bandwidth—vital when an in-memory database faces massive concurrent reads. Finally, CL5 latency tightens access time, minimizing wait states in time-sensitive transactions. Together, they keep your virtualized clusters and real-time analytics uncorrupted, fast, and online, directly protecting uptime SLAs and revenue.
General Virtualization
Virtualized environments quickly exhaust memory. Install at least 16 identical modules (16GB) evenly across all memory channels to enable interleaving and support several lightweight VMs. Use identical ranks per channel, and populate in multiples of four to align with typical quad-channel FB-DIMM layouts.
In-Memory Database
Achieve maximum capacity by filling all available slots—up to 64 modules for 64GB on supported platforms. ECC and buffering ensure data integrity for large in-memory tables; accept the higher FB-DIMM latency since capacity is the primary performance lever. Verify the system’s maximum rank count per channel.
High-Performance Computing (HPC)
HPC prioritizes bandwidth. Install four modules per channel to fully exploit the point-to-point serial links; the dual-rank x8 design already optimizes throughput. Keep total capacity moderate to minimize latency, and provide robust cooling because FB-DIMMs dissipate significant heat.
Rigorously tested for server compatibility: Dell PowerEdge 2950/1950, HP ProLiant DL380 G5, IBM System x3650.
Q: Can I mix this M395T2953EZ4-CE66 with other memory modules of different brands or speeds?
A: Mixing FB-DIMMs with different speeds or brands is not recommended. The system will clock all modules to the slowest common speed, and mismatched ECC or buffer parameters may cause instability. For mission-critical servers, use identical part numbers.
Q: Is this memory compatible with my system?
A: This module is designed for server platforms supporting DDR2-667 Fully Buffered DIMMs with ECC. Verify your board or system supports 240-pin FB-DIMMs and a 1.8V memory controller. Refer to your server's qualified vendor list for precise compatibility.
Q: What is the recommended DIMM population order for optimal performance?
A: Follow your server's manual for rank and channel interleaving. Typically, populate identical dual-rank FB-DIMMs in matched sets per channel, starting from the slots farthest from the CPU. Incorrect order can reduce memory bandwidth or prevent POST.
Q: Does this module support overclocking or XMP profiles?
A: No. Server-class FB-DIMMs are designed for stability at JEDEC standard speeds and voltages (DDR2-667, 1.8V). Overclocking and XMP are not supported, as they compromise ECC data integrity crucial for enterprise workloads.
Q: What warranty and typical failure rate can I expect?
A: This product includes a one-year warranty covering manufacturing defects. Typical annualized failure rates for server FB-DIMMs are very low when operated within specification, thanks to rigorous testing and ECC reliability features.