An electrical connector assembly includes: an insulative housing; a terminal module including a first terminal module and a second terminal module stacked with each other in a vertical direction; and a cable electrically connected to the terminal module; wherein the first terminal module includes a first row of terminals and a first insulating member holding the first row of terminals, the second terminal module includes a second row of terminals and a second insulating member holding the second row of terminals, each of the first row of terminals and the second row of terminals include a sideband terminal area and high-speed terminal areas located on the two sides of the sideband terminal area, the cable is mechanically and electrically connected to the high-speed terminal area, and the first row of terminals and the second row of terminals have same structure.