A card edge connector (100) includes an elongate insulative housing (1), a plurality of signal contacts (3) and a pair of power contacts (4) retained in the insulative housing (1). The insulative housing (1) defines a pair of opposed side walls (11) and a central slot (13) between the side walls (11). Each side wall (11) defines a plurality of passageways (110) communicating with the central slot (13). Each signal contact (3) has an engaging portion (32) exposed to the central slot (13.) Each power contact (4) has a securing portion (41) retained in the insulative housing (1), a plurality of contact portions (42) extending upwardly and sidewardly into the central slot (13) from the securing portion (41) and arranged in a row along a length direction of the insulative housing (1), and at least one tail portion (43) extending downwardly from another end of the securing portion (41).