A cable connector assembly includes a connector and a cable, the cable including plural core wires arranged in an upper and a lower rows, wherein several pairs of high-speed signal lines, a pair of low-speed signal lines, a power signal line, and a spare signal line are located in the upper row, and other pairs of high-speed signal lines, a detection signal line, a power supply line, another spare signal line, and another power signal line are located in the lower row.