What Is USB 2.0?

USB (Universal Serial Bus 2.0) is a new interface technology applied in the field of computers. The USB interface has faster transfer speeds, supports hot plugging, and connects multiple devices. Has been widely used in various types of external equipment. There are four (five) types of USB interfaces: USB1.1, USB2.0, USB3.0, and USB3.1 (3.1Gen 1 and 3.1Gen 2). Theoretically, USB1.1 can reach a transmission speed of 12Mbps, while USB2.0 can reach a speed of 480Mbps, and is backward compatible with USB1.1. As early as 1995, there were already personal computers with USB interfaces, but due to the lack of software and hardware support, the USB interfaces of these personal computers were idle. After 1998, with Microsoft's built-in support module for USB interface in Windows 98, and the increasing number of USB devices, the USB interface has gradually entered the practical stage. In recent years, with the popularization of a large number of personal computers supporting USB, USB has gradually become the standard interface for personal computers. On the host side, the newly launched personal computers support almost 100% USB; on the peripheral side, devices using the USB interface are also increasing, such as digital cameras, scanners, joysticks, tapes and floppy drives, imaging devices, printers, keyboards, mice and many more.

USB 2.0

USB (Universal Serial Bus 2.0) is an application

Hot-swappable

This allows users to use external devices without having to

Note: The Mbps mentioned in this article is "Megabits per second", not the "Megabits" that we use every day.

The USB 1.0 standard developed in 1996 is a low-speed version of USB 2.0. The theoretical transmission speed is 1.5 Mbps, which is 0.1875MB / s. USB devices using this standard are relatively rare;

The USB 1.1 standard developed in 1998 is a full-speed version of USB 2.0. The theoretical transmission speed is 12 Mbps, which is 1.5 MB / s. USB devices using this standard are more common;

The USB 2.0 standard developed in 2000 is true USB 2.0, known as the High-speed version of USB 2.0. The theoretical transmission speed is 480 Mbps, which is 60 MB / s, but the actual transmission speed generally does not exceed 30 MB / s, there are more USB devices using this standard.

How to change usb to 2.0 without entering BIOS

1. Plug your mobile hard disk into the USB interface first, and then wait until everything is right. Right-click My Computer and click Properties, then click Hardware, then click Device Management, and then click Universal Serial Bus Controller to uninstall it , Mine is USB Mass Storage Device

(Right-click on the USB Mass Storage Device and select Uninstall. If you get it out, it's better not to mess around!)

2. The removable hard disk just plugged into the usb interface (the same thing you plugged in) don't unplug it and download a usb2.0 intel driver.

3. Run the usb2.0 intel driver under you, the removable hard disk on the interface (the same thing you plugged in) will be connected, this is your usb is 2.0, I have tried usb2.0 The transmission speed is 3 times faster than the lower version of USB.