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

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Pavel Yosifovich
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Continuously in the technological world, tools are created to facilitate human life. And is that technological developments, no matter how much small, create a big impact around the world.

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 need to know what it is to get into more details about it.

What is USB?

Universal Serial Bus or simply from the acronym USB, it 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 via these USB sticks and it is very easy to connect a USB stick to a mobile phone to transfer files. 

It has a structural standard for cables, connectors and communication protocol, thus realizing its interface goal in an exceptional way. Whether it is computers, peripherals or electronic devices, via USB there is continuous connection and communication between them.

Able to provide one electric current, and in this way to load the devices without using an external agent for the people involved. It has Plug & Play technology, which means that when you connect a device, the procedure will be activated automatically.

Differences between USB 2.0 and USB 3.0

In version 2.0 the direction of transfer is one-sided, information is received or sent, but cannot be performed at the same time. However, version 3.0 has a bidirectional transfer direction, which allows both processes to run at the same time.

The transfer speed of 2.0 reaches up to 480 Mbit / s (60 MB / s), High Speed, the real speed of which is 280 Mbit / s (35 MB / s). In 3.0 it features an 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 four-line cable, two for data and two for power. The 3.0 has a nine-line cable, for optimization.

Types of connectors

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

  • USB type A: used by versions USB 1.0, 2.0, 3.0 and 3.1. In version 3.0 it is differentiated by a blue tab inside, if it doesn't have it, its speed is lower.
  • USB type B: normally used in printers or scanners. There are two types, one for versions 1.0 and 2.0, and another for 3.0 with the respective blue color inside.
  • USB Type C: Latest generation because 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, 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 it 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 earlier in the differences between these two versions of the USB standard, there is a big difference in terms of speed. What makes version 3.0 noteworthy is that it has a faster speed than the version 2.0 It's 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 provide electrical current.

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

If, on the other hand, you want to copy video from a DVD from your USB stick, this article is of interest to you. Keep learning all about USB ports and find out how to access the drive connected to your router's USB port.


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