The speed of USB3.0 is ten times that of USB2.0, and it is more energy-efficient than USB2.0. At the same time, it is also backward compatible with USB2.0. So, how do we distinguish between USB2.0 and USB 3.0.
-
Computer (with USB2.0 and USB3.0 sockets)
-
Notebook (with USB2.0 and USB3.0 sockets)
method/step
-
First of all, for computers, some old computers only have USB2.0, but now the new computers have USB2.0 and USB3.0 sockets.
-
Color distinction method: The computer can be distinguished according to the color of the socket. The black one is USB2.0, and the blue one is USB3.0 (usually located behind the host, because USB3.0 needs to install the driver).
-
Contact method: USB 2.0 has only 4pin metal contacts, while USB 3.0 has 9pin contacts. The front 4pin is one with USB 2.0, and the rear 5pin is exclusive to USB 3.0.
-
Identification method: distinguish according to the symbol next to the socket, as shown in the figure below. The "SS" of USB3.0 stands for "SuperSpeed"
-
There is another type, the USB 3.0 standard B type interface is larger in size than the USB 2.0, and the color is also blue. The upper part is more prominent and accommodates the newly added 5pin contacts, which cannot be accessed by USB 2.0. This is a better distinction. Not to be confused with USB 2.0.