Micron MT9HTF6472FY-667A2D1 512MB DDR2-667MHz FB-DIMM 1Rx8 CL5 Memory

Product Description

The Micron MT9HTF6472FY-667A2D1 is a 512MB DDR2 Fully Buffered DIMM (FB-DIMM) memory module, specifically designed for server platforms that require high memory density and advanced features. DDR2 FB-DIMMs represent a generation of server memory technology that introduced an Advanced Memory Buffer (AMB) chip on each module. This buffer chip serializes data between the memory module and the memory controller, effectively decoupling the module's speed from the controller's speed and allowing for higher memory capacities and improved signal integrity, especially in systems with many memory slots. This particular module operates at a frequency of 667MHz (also known as PC2-5300F), providing a substantial data transfer rate suitable for demanding server applications. It features a CAS Latency (CL) of 5, which dictates the timing delay for data access. The 1Rx8 configuration indicates it is a single-rank module with an x8 data width, meaning it has 8 memory chips, each with a data width of 1 bit, arranged on one side of the PCB. This configuration is common for modules of this capacity and speed. As an FB-DIMM, this module inherently supports Error-Correcting Code (ECC) functionality, which is critical for server environments to ensure data integrity and system stability by detecting and correcting single-bit errors. The presence of the AMB chip is a defining characteristic of FB-DIMMs, distinguishing them from standard unbuffered DIMMs (UDIMMs) or registered DIMMs (RDIMMs) of the same DDR generation. These modules were prevalent in servers from manufacturers like Dell, HP, and IBM during the DDR2 era.