Thunderbolt 3 brings users a more enjoyable life with more speed on data transmission; more pixels on video streaming and more protocols can be communicated through this compact port that does it all. The Thunderbolt 3 cable data transfer speed is up to 40Gbps ; Please NOTE that the data transfer speed will still depend on what port you are using with. USB 3.1 Gen 2(10 Gbps) USB3.1 gen 1/ 3.0(5 Gbps)