See https://electronics.stackexchange.com/questions/29141/interconnect-capacitance-and-speed-of-data-transmission https://electronics.stackexchange.com/question

See https://electronics.stackexchange.com/questions/29141/interconnect-capacitance-and-speed-of-data-transmission https://electronics.stackexchange.com/questions/29141/interc... At some point (if you go to high enough frequencies), the capacitance of the copper traces will become high enough (i.e. without any capacitor component connecting to a trace between a CPU and a RAM module) to prevent further frequency increases. One way to deal with that is to have shorter traces. This is exactly what CAMM memory modules do - they have shorter (total) traces than DIMM. Even shorter traces are possible if you get rid of modules completely (i.e. solder the RAM chips to the motherboard). Better yet is to place RAM and CPU cores on one chip, skipping even the motherboard traces between the CPU and RAM chips.