Registered Memory - Compatibility

Compatibility

Usually the motherboard must match the memory type: registered memory will not work in a motherboard not designed for it, and vice-versa. Some PCs will accept registered memory, but registered and unregistered memory cannot be mixed. There is much confusion between registered and ECC memory; it is widely thought that ECC memory will not work (without ECC functionality) in a motherboard without ECC support, although the compatibility issues arise when trying to use registered server memory (which also supports ECC and is described as ECC RAM) in a desktop PC motherboard.