An exemplary motherboard includes a driving module, at least two first slots arranged for mounting two first type of memories, at least two second slots arranged for mounting two second type of memories, and a voltage regulator. The driving module is electronically connected to the at least two first slots, the at least two second slots, and the voltage regulator in turn via a channel. The first type of memories and the second type of memories are alternatively mounted on the motherboard, the voltage regulator detects which type memory is currently mounted on the motherboard and outputs voltages suitable for the type of memory mounted on the motherboard accordingly.