An electrical connector assembly includes plural wafers and the corresponding shielding plates are alternately stacked with one another. Each wafer includes a conductive housing defining plural slots therein, and plural terminal modules received in the corresponding slots, respectively. Each of the terminal modules includes a pair of differential contacts and an insulative holder retaining the pair of differential contacts. A plurality of cable assemblies correspond to the corresponding wafers. Each cable assemblies includes a plurality of cables each including a pair of differential wires respectively connected to the pair of differential contacts, respectively.