Micron MT36HTF51272FDY-80EE1D6 4GB DDR2-800MHz FB-DIMM 4Rx8 CL5 Memory

Product Description

The Micron MT36HTF51272FDY-80EE1D6 is a 4GB DDR2 Fully Buffered DIMM (FB-DIMM) module, designed for server and workstation platforms that utilize this specific memory technology. FB-DIMMs were introduced to overcome the electrical limitations of traditional Registered DIMMs (RDIMMs) in high-density memory configurations. They achieve this by incorporating an Advanced Memory Buffer (AMB) chip on each module, which serializes and deserializes data, effectively isolating the memory controller from the DRAM chips and reducing signal degradation. This module operates at a speed of 800MHz (PC2-6400F), providing a substantial bandwidth for its generation. It is configured as 4Rx8, meaning it is a Quad Rank module with each rank consisting of x8 (8-bit wide) DRAM chips. The CAS Latency (CL) is 5 clock cycles. While FB-DIMMs generally have higher latencies compared to RDIMMs, their increased bandwidth and ability to support higher memory capacities made them suitable for demanding server applications of their era, such as large databases, virtualization, and high-performance computing. The FB-DIMM design inherently includes ECC (Error-Correcting Code) functionality, which is crucial for maintaining data integrity in server environments. The AMB chip also handles the buffering and re-driving of signals, contributing to system stability. Although DDR2 FB-DIMMs have largely been superseded by newer DDR3, DDR4, and DDR5 technologies, they remain relevant for maintaining or upgrading older server systems that were designed to accommodate them. This 4GB module represents a significant memory capacity for systems of that generation.