The Registered Clock Driver (RCD)  is a key component used in DDR5 server memory modules (RDIMM and LRDIMM). Its main function is to act as a repeater and buffer between the CPU's memory controller and the DRAM chips on the memory module, primarily for command/address signals and clock signals.

This blog introduces how to Testing DDR5 RCD based on Tower I3C Host Adapter:

Testing DDR5 RCD based on Tower I3C Host Adapter(1)