Registered (sometimes called "buffered") memory modules have additional components between the SDRAM modules and the system's memory controller. They place less electrical load on the memory controller and allow single systems to remain stable with more memory modules than they would otherwise. Registered memory is slightly slower than unregistered/unbuffered memory, and more expensive as well, so it is usually found only in applications where the need for scalability and stability outweighs the need for speed and a low price (servers, for example). Registered memory should not be confused with ECC memory; although many server-grade memory modules are both ECC and registered, there are registered non-ECC modules and non-registered ECC modules.

	Acer Memory	Apple Memory	Cisco Memory	Compaq Memory	Dell Memory	Fujitsu Memory	Gateway Memory
	HP Memory	IBM Memory	Intel Memory	Sharp Memory	Sony Memory	Sun Memory	Toshiba Memory