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| Product Type | Memory Module |
|---|---|
| Compliance Standards | RoHS |
| Memory Capacity | 4 GB |
| Memory Technology | DDR2 |
| Product Voltage | 1.8V |
| RAM Speed | 667MHz |
| RAM Standard | DDR2-667/PC2-5300 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL5 |
| Rank | Dual Rank x4 |
| Quantity of Pins | 240-pin |
| RAM Genre | RDIMM |
This 4GB DDR2-667 Registered ECC RDIMM targets legacy server platforms running memory-intensive workloads like virtualization and small in-memory databases, where its registered signal buffering stabilizes multi-DIMM channels and hardware ECC corrects single-bit errors to maintain data integrity. The dual-rank x4 organization combined with CL5 latency strikes a practical balance between rank-interleaved bandwidth and responsive access patterns on aging yet reliable enterprise systems.
1. Error-correcting code protection silently fixes single-bit memory faults in real time, safeguarding transactional integrity essential for financial databases and mission-critical enterprise workloads.
2. Registered signal buffering stabilizes command and address lines across fully populated memory channels, preventing signal degradation that could otherwise crash heavily loaded server platforms.
3. Dual-rank layout interleaves data requests between independent DRAM banks, maximizing sustained bandwidth for virtualization hosts running multiple guest machines concurrently.
4. The module’s capacity expands total system memory depth, enabling higher consolidation ratios for virtualized services before older generation servers hit their physical memory ceiling.
5. DDR2-667 speed grade supplies sufficient throughput to saturate processor front-side buses, eliminating bottlenecks when simultaneous client connections spike in web and application serving.
Designed for servers, the MT36HTF51272PY-667E1 4GB DDR2-667 RDIMM integrates four critical features—ECC, registered buffering, dual-rank x4, and 667 MHz speed—that matter in real-world deployments. In a virtualization cluster, the registered buffer permits filling all DIMM slots without signal dropout, ensuring stable, high-capacity memory for live migration and consolidated workloads. ECC corrects single-bit errors from cosmic radiation or aging hardware; for a 24/7 financial database or IoT sensor pipeline, this eliminates silent corruption that could trigger faulty transactions or analytics. Dual-rank x4 enables rank interleaving, masking row-access delays. In an in-memory database like Redis or SAP HANA, this translates to faster cache operations and consistently low latency under peak concurrency. Together, these attributes deliver 5.3 GB/s bandwidth at 1.8V, providing a reliable, RoHS-compliant upgrade for legacy server environments.
General Virtualization
For lightweight virtualization on legacy DDR2-era servers, populate at least four of these 4 GB RDIMMs to reach 16 GB total — the bare minimum for a small hypervisor running a handful of low-resource VMs. Use balanced dual- or quad-channel configurations where the chipset supports it, matching identical dual-rank x4 modules to maintain signal integrity and registered ECC stability.
In-Memory Database
In-memory databases demand large, contiguous addressable space; with 4 GB DIMMs you will need all available slots. Fully populate every channel with identical 4 GB registered modules to maximise capacity — a typical eight-slot system yields 32 GB, sufficient only for modest test or legacy caching workloads. Ensure ranks per channel are balanced to avoid command-rate penalties that hurt latency-sensitive transactions.
High-Performance Computing
HPC clusters utilising DDR2-667 must prioritise memory bandwidth through uniform multi-channel population. Install six or eight of these dual-rank modules in a triple- or quad-channel layout to feed data-intensive floating-point kernels, as registered ECC corrects soft errors in long-running jobs. Given the 667 MT/s speed, cluster scale is more critical than per-node capacity, so aim for memory symmetry across all nodes.
Rigorously tested server-grade compatibility: compatible with Dell PowerEdge 2950, HP ProLiant DL380 G5, IBM System x3650.
Q: Can I mix this MT36HTF51272PY-667E1 with other memory modules of different brands or speeds?
A: Mixing is strongly discouraged in server environments. Mismatched brands, speeds, or ranks can cause instability and POST failures. Always populate identical RDIMMs to ensure reliable ECC operation and interleaving.
Q: Is this memory compatible with my server?
A: It is designed for servers using Intel or AMD platforms that support DDR2 Registered ECC memory. Verify your motherboard requires 240-pin DDR2-667 RDIMMs at 1.8V before ordering.
Q: What is the recommended DIMM population order for optimal performance?
A: Install identical modules in matched sets, typically starting with the slots farthest from the CPU. Follow your server board's color-coded channel groups to enable dual-channel interleaving and maximize throughput.
Q: Does this module support overclocking or XMP profiles?
A: No. This is a Registered ECC server module. It operates strictly at JEDEC-defined CL5-5-5-15 timings and 667MHz. Overclocking or XMP is not supported, as data integrity and stability are paramount.
Q: What warranty and typical failure rate can I expect?
A: It includes a one-year warranty. Enterprise-class RDIMMs undergo rigorous testing, resulting in an extremely low annualized failure rate (AFR) under specified server operating conditions, ensuring long-term reliability.