This cable received in black, is not a USB 3.0 Tested on a USB 3.0 port with a valid Corsair USB 3.0 key that works well. The key plugged directly into the USB 3.0 on the rear of the housing is recognized USB 3.0 port and has a rate of about 70 MB / s. By putting the cable in between, to facilitate access, the key is not USB 3.0 and has not recognized a rate of about 35 MB / s.