➀ CUDIMM, or Clocked Unbuffered DIMM, is designed to improve signal integrity in high-frequency DDR5 memory modules by introducing a Clock Driver (CKD). ➁ The CKD splits the clock domain into DCK (connected to the CPU) and QCK (connected to devices), similar to the RCD in RDIMM but simplified. ➂ For laptop memory modules (SODIMM), a similar approach is taken with CSODIMM, which also incorporates a CKD for enhanced clock signal management. ➃ JEDEC recommends CUDIMM for UDIMM modules above PC5-6400, and CKD solutions are available from various manufacturers, including Lanqi in China.