Each USB interface of the computer can provide a voltage of DC5V and a maximum current of 500MA. However, there are many USB interfaces of new motherboards that can provide current of1.5a. Please refer to the motherboard manual. Generally, the USB interface of the motherboard provides 500MA current. The voltage is marked as 5V.

USB is the abbreviation of Universal Serial Bus in English and serial line in Chinese. It is an external bus standard that regulates the connection and communication between computers and external devices.