What is the difference between a registered module and an unbuffered module?
A registered module is a memory module that performs data transfer via registers on the memory module. Since the address and command signals are stored once to the registers so they can be output all at the same time, in synchronization with the PLL, stable signal transmission is possible even if the number of components added to the module increases. Thus, registered modules are ideal for servers and workstations that require large capacities and high reliability. By contrast, unbuffered modules use a configuration without the registers described above, and they are used mainly in PCs.
