Differences between USB 2.0 and USB 3.0? What types are there? Which is better in speed?

Continuously in the technological world, implements are created to facilitate human life. And it is that technological developments, no matter how small, create a great impact worldwide.

Humanity does not cease to be surprised by each of the discoveries of brilliant minds and it is that behind these ideas there is a great effort. One of these fascinating creations is the USB , you can buy a USB stick on Amazon . But first we must know what this is in order to go into more details about it.

What is USB?

Universal Serial Bus or simply by the abbreviations USB, is a channel with a digital system that allows the transfer of data between devices. It was developed by a group of companies such as Intel, IBM, Microsoft and other companies, it was launched on the market in 1996.

Nowadays most of the people transfer documents and files through these USB sticks, and it is very easy to  connect a USB stick to a cell phone to transfer files. 

It has a structural standard for cables, connectors and communication protocol, thus fulfilling its interface objective in an exceptional way. Whether they are computers, peripheral devices or electronic devices, through USB there is continuous connection and communication between them.

Capable of supplying an electric current, and in this way charging devices without using an external agent to those involved. It has Plug & Play technology, that is to say that when a device is connected, the procedure will be activated automatically.

Differences Between USB 2.0 and USB 3.0

In version 2.0 the transfer direction is unilateral , information is received or sent, but it cannot be done simultaneously. However, version 3.0 has a two-way transfer direction, allowing both processes to be done at the same time.

The transfer speed of the 2.0 is up to 480 Mbit / s (60 MB / s), High Speed, whose real rate is 280 Mbit / s (35 MB / s). In the 3.0 it presents one of up to 4.8 Gbit / s (600 MB / s), SuperSpeed.

The 2.0 power supply is 500 mA, while the 3.0 version is 900 mA. In USB 2.0 there is a cable with four lines, two for data and two for power. The 3.0 has a nine-line cable, for optimization .

Connector types

On the other hand, how many types of connectors are there? What versions use these connectors? Here we will show you five types of these:

  • USB Type A: Used by USB versions 1.0, 2.0, 3.0 and 3.1. In version 3.0 it is differentiated by a blue tab inside, if it does not have it, its speed is lower.
  • USB Type B: Typically used in printers or scanners. There are two types, one for versions 1.0 and 2.0, and another for 3.0 with its respective blue color inside.
  • USB Type C: Latest generation because it is reversible, you can connect devices on both sides without any problem, used in 3.0 and 3.1.
  • Mini USB: Commonly used in cameras and mobile devices , either mini A or mini B are compatible with versions 1.0 and 2.0.
  • Micro USB: Among the most used in small devices, if it is micro AB it is for 1.0 and 2.0, and if micro B is functional for 1.0 and 0.2.

For 3.0 and 3.1 the latter changes a bit in shape and blue is always present inside.

 Which is better in speed version 2.0 or 3.0?

As we saw previously in the differences between these two versions of the USB standard, there is a big difference in terms of speed. What makes it remarkable that version 3.0 has a higher speed than version 2.0 is its SuperSpeed ​​technology.

In addition, it is due to the inclusion of five more contacts in its structure, thus allowing an increase in the performance of the version. Since two of its cables are used to receive information, while another two to send it, and the other five to supply electrical current.

So put yourself to the test! Apply what you have learned today, see if you can differentiate the USB ports of your devices.

On the other hand, if you want to copy videos from a DVD from your USB Flash Drive, this article interests you. Continue learning everything related to USB ports and discover how you can access the unit connected to the USB port of your router.


by Abdullah Sam
I’m a teacher, researcher and writer. I write about study subjects to improve the learning of college and university students. I write top Quality study notes Mostly, Tech, Games, Education, And Solutions/Tips and Tricks. I am a person who helps students to acquire knowledge, competence or virtue.

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