A high speed cable assembly includes a ribbon cable and a high speed connector. The ribbon cable includes a number of wires and a jacket enclosing the wires. Each wire has a central conductor and a shielding layer covering the conductor. The ribbon cable provides differential pairs of wires and drain wires, each drain wire positioned next to one differential pair of wire. The high speed connector has an insulating housing, and a printed circuit board assembled within the insulating housing. The printed circuit board is provided with first group of golden fingers on one end thereof, which are formed to electrically connect to the wires of the ribbon cable, respectively, and second group of golden fingers on the other end thereof, which are configured to form an I/O interface for transmitting high speed signals to a complementary connector.