As the same with upgrading from USB 1.1 cable to USB 2.0 cable, the physical characteristics of USB 3.0 cable and interface is downward compatible. Of course, as long as the equipment, interfaces or the cable do not support the standard of USB 3.0 cable, it will not achieve superspeed's high speeds. But, at least the USB 3.0 cable plug on 2.0 interface will not explode. The crucial point of compating is the interface design of USB 3.0 cable. There are totally four lines of USB 2.0 cable interface, two are correspond to the data input and output, the other two for power and ground resolution. USB 3.0 cableincreases five contacts on this basis. These four new contacts stand side by side in the rear of USB 2.0 cable contacts. In other words, you can tell the difference between 3.0 and 2.0 cable from the USB interface.
Maximum speed
The maximum transmission speed of USB 3.0 cable is 4.8Gbps, more than 10 times than USB 2.0 cable's 480Mbps. According to Intel’s official statement, application USB 3.0 cable can transfer a 27GB high-definition movies within 70 seconds, and the application takes 15 minutes or more of USB 2.0 cable. Of course, this speed requires the support of storage device, the solid-state hard drive may benefit from the USB 3.0 cable in the future, while traditional hard disk can not keep up with the full speed of USB 3.0 cable. Besides, Windows system must install a new Mass Storage Device driver to support the standard of new USB.
.jpg)
.gif)