Difference between USB 2.0 and USB 3.0

USB (Universal Serial Bus):
A Universal Serial Bus (USB) is an interface that enables the communication between devices and a host controller such as a computer system. It connects peripheral devices such as digital cameras, mouse, keyboards, scanners, printers, media devices, flash drives and external hard drives. It has a wide variety of uses, including support for electrical power that is why the USB has replaced a wide range of interfaces like the parallel and serial port.
There are different types of USB ports used to connect the peripheral devices to the computer. Some of them are:

  1. USB 1.x: It is an external bus standard that can capable of data transfer with the speed of 12 Megabits per second and can support up to 127 peripheral devices.
  2. USB 2.0: it is also known as hi-speed USB. It was introduced in 2000. It is an updated version of USB 1.1, which provides improved functionalities and better speed. It is capable to deliver the maximum transfer speed of 480 Megabits per second. However, practically it is approximately 280 Mbps.
  3. USB 3.0: it is also known as SuperSpeed USB and was first made available in November 2009. It is a much-improved version of USB 2.0. It supports the data transfer rate of 5 Gigabits per second, which is much much faster than the speed provided by USB 2.0.
  4. USB 3.1: It is also known as SuperSpeed+, and it was introduced in 2013. USB 3.1 is the latest version of the USB protocol. It is almost two times faster than the USB 3.0 and can transfer the data at the rates of up to 10 Gigabits per second.
  5. USB 2.0 and USB 3.0 are the ones that are majorly used in the Computer Systems and Laptops. So, in this article, we will discuss the difference between USB 2.0 and USB 3.0.

    Difference between USB 2.0 and USB 3.0:

    S.NO USB 2.0 USB 3.0
    1. Data transmission rate of USB 2.0 is 480 Mbps. While data transmission rate of USB 3.0 is 4800 Mbps.
    2. USB 2.0 has four number of wires. While USB 3.0 has nine number of wires.
    3. USB 2.0 is a one-way communication. While USB 3.0 is a two-way communication.
    4. USB 2.0 is a less costly. While It is costlier than USB 2.0.
    5. USB 2.0 cable length can be up to five meters. While USB 3.0 cable length can be up to three meters.
    6. USB 2.0 delivers 500 mA amount of power. While it delivers 900 mA amount of power.
    7. Black block occurs within USB 2.0. Whereas blue block occurs within USB 2.0.


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