What is Unbuffered/Buffered/Registered Memory ?
EDO (Enhanced Data Output) and FPM (Fast Page Mode) modules can be buffered or unbuffered. Buffered modules contain a buffer to help the motherboard cope with the electrical load when the system has a lot of memory. DDR (Double Data Rate) and SDRAM (Sync Data Random Access Module) modules are either unbuffered or registered. Registered modules have a register that delays the transfer of data by one clock cycle. Unbufferred modules are generally found in desktops and laptops. Bufferred and Registered modules are typically found in servers/workstations where data is extremely important.
