Yes, to get USB 3.0 speeds, you need special USB 3.0 cables. ... Even though you can connect a USB 3.0 device via a USB 2.0 cable, in order to achieve full USB 3.0 speeds you need to re-wire any existing cabling. USB 3.0 cables are generally thicker because they have nine internal wires versus four on USB 2.0 cables.Jul 7, 2015