An interconnection system including a first gating unit and a second gating unit is provided. The first gating unit includes two terminals, with one terminal connecting to a first CPU directly, where the two terminals are indirectly connected when the first gating unit is in a first state. The second gating unit includes two terminals, with one terminal connecting to a second CPU, where the two terminals are connected when the second gating unit is in the first state. Another terminal of the first gating unit is connected to another terminal of the second gating unit. If both the first gating unit and the second gating unit are in the first state, the first CPU is connected to the second CPU.