An electrical connector including a housing; ground contacts; and signal contacts. The signal contacts are differential signal pairs. The electrical connector is a right angle connector. First ends of the ground contacts are in a center row. First ends of a first one of the each differential signal pair are on a first side row at a first side of the center row. First ends of a second one of the differential signal pairs are on a second side row at a second opposite side of the center row. At least one of the first ends of the ground contacts is provided between the first ends of two of the differential signal pairs. An assembly is provided including the electrical connector and a printed circuit board having the electrical connector mounted thereon. The printed circuit board includes through-holes with a shared single antipad one of the differential signal pair.