Simple definition
RDIMM is registered server memory that buffers command and address signals; compatibility depends on the processor and motherboard.
Purpose and use
An RDIMM, Registered Dual In-line Memory Module, uses a register for selected signals between the memory controller and module components.
How does it work?
Command and address handling differs from UDIMM; a conventional RDIMM does not buffer data in the same way as LRDIMM.
Example and verification
Check module type and manufacturer rules for mixing or populating memory.
Points to watch
ECC and registered are different characteristics. One does not establish every compatibility requirement of the other.
In short
Choose memory against all platform requirements rather than capacity alone.