Teach you how to quickly identify a computer company the USB interface in the Win7 system is 3.0 or 2.0

1. The number of pins that the hardware determines

USB Although the profile is an interface, but its internal actual work is the main line, in the USB2.0 interface over the existence of four pieces of copper foil, in fact, this is the basic USB2.0 communication lines, in the cables are red black and white line, and the USB3.0 interface of the upper five pieces of copper foil, under the existence of four pieces of copper foil. In this case, in fact, there are nine lines on the USB3.0, USB 2.0 is 4 pins, and USB 3.0 uses 9 pins with more pins than USB2.0, as shown in the following illustration:

2, through the Device Manager to determine the USB interface

First right click on the computer icon, then select Properties → Device Manager, click the Universal Serial Bus controller in Device Manager to view the status of the USB interface.