> This essentially involves measuring lengths of wires from memory controller to individual DRAM chips. The idea there is that it is impossible to make them well-enough matched for the frequencies involved, so the deliberate difference is compensated for in logic and software (also it saves space on PCB of both motherboard and the DIMMs themselves).

https://www.systemverilog.io/design/ddr4-initialization-and-...

https://www.youtube.com/watch?v=_U3-hST9YBg