240-Pin Fully-Buffered DDR2 SDRAM Modules DDR2 SDRAM

This document HYS72T64400HFA3S-B describes the electrical and mechanical features of a 240-pin, PC2-4200F, PC2-5300F, ECC type, Fully Buffered Double-Data-Rate Two Synchronous DRAM Dual In-Line Memory Modules (DDR2 SDRAM FB-DIMMs). Fully Buffered DIMMs use commodity DRAMs isolated from the memory channel behind a Buffer on the DIMM. They are intended for use as main memory when installed in systems such as servers and workstations. PC2-4200F, PC2-5300F, refers to the DIMM naming convention indicating the DDR2 SDRAMs running at 266, 333, MHz Clock speed and offering 4200, 5300, MB/s peak bandwidth. FB-DIMM features a novel architecture including the Advanced Memory Buffer This single chip component, located in the center of each DIMM, acts as a repeater and Buffer for all signals and commands which are exchanged between the host controller and the DDR2 SDRAMs including data in- and output. The AMB communicates with the host controller and / or the adjacent DIMMs on a system board using an Industry Standard High-Speed Differential Point-to-Point Link Interface at 1.5 V By Qimonda