A cable assembly includes: a cable having plural wires; a wire clamp disposed at a front of the cable; and a shielding sheet fixed to the wire clamp, wherein the plural wires are divided into an upper row and a lower row and fixed to the wire clamp, front ends of the plurality wires extend forward beyond the wire clamp to be directly connected to a mainboard, and the shielding sheet isolates the upper row of wires from the lower row of wires.