Abstract: A motherboard/daughterboard assembly is configured to permit upgrading of a system to a microprocessor requiring different clock signals. The motherboard includes a clock generator mounted on the motherboard with a control input terminal and an output terminal. The clock generator delivers a first and second clock signal on the output terminal in response to receiving a first and second signal on the control input terminal, respectively. A first electrical connector is mounted on the motherboard and has a first terminal. The first terminal is coupled to the control input terminal of the clock generator. The daughterboard has a second electrical connector mounted thereon, and a first terminal. The second electrical connector is mateable with the first electrical connector to electrically engage the first terminals of the first and second electrical connectors.