Micron MT18HTF12872JDY-667F1D4 1GB DDR2-667MHz FB-DIMM 2Rx8 CL5 Memory

Product Description

The Micron MT18HTF12872JDY-667F1D4 is a 1GB memory module belonging to the DDR2 generation of SDRAM. It operates at a speed of 667MHz, identified by the PC2-5300F designation, and features a CAS Latency (CL) of 5. This module utilizes the Fully Buffered DIMM (FB-DIMM) form factor, which incorporates an Advanced Memory Buffer (AMB) chip on each module. The AMB chip serializes data transfers between the memory controller and the DRAM chips, enabling higher memory densities and speeds than traditional unbuffered DIMMs, albeit with increased latency and power consumption. The module is configured as 2Rx8, meaning it is dual-rank with eight data bits per DRAM chip. Dual-rank modules can offer performance benefits through rank interleaving, where the memory controller can access different ranks concurrently. The 1GB capacity is modest by today's standards but was significant for server memory configurations during the DDR2 era. The 667MHz speed and CL5 latency represent a typical performance profile for DDR2 FB-DIMMs designed for server applications where capacity and stability are often prioritized over raw speed. FB-DIMMs were commonly used in servers and high-end workstations from the mid-2000s. They allowed for greater memory scalability in systems that supported this technology. It is important to note that FB-DIMMs generate more heat than other DIMM types due to the AMB chip and require specific motherboard support. The MT18HTF12872JDY-667F1D4 part number precisely identifies this specific 1GB DDR2-667MHz FB-DIMM module from Micron.