Registered vs. Non-Registered SDRAM

[Cuch]

What are the differences between registered vs. non-registered (standard) SDRAM memory modules? Thanks in advance!

 

[PerfectFit]

The term "registered" refers to how the memory module processes signals. Registered modules contain a register that delays all information transferred to the module by one clock cycle. This type of memory is primarily used in servers and was designed for modules with 32 or more chips on them to help ensure that data is properly handled.

While most PCs will accept only unbuffered (aka non-registered) SDRAM, there are some that accept registered SDRAM. Keep in mind that when you install registered SDRAM, all of the modules installed in your PC must be registered because unbuffered and registered modules are not interchangeable.

You can tell if you are using registered memory by looking at one of the modules currently installed in your system. If it has one or more small black chips mounted horizontally on the module, you have registered memory. If not, you have unbuffered memory.

Keep in mind that unbuffered memory is faster than registered memory. The register in registered memory delays all information transferred by one clock cycle, slowing the overall system performance

If you are not sure whether your motherboard or PC supports registered SDRAM check it out at crucial.com