10 Important Difference Between USB 2.0 And USB 3.0 (Tabular Form)

difference between USB 2.0 and USB 3.0
What is the difference between USB 2.0 and USB 3.0?

A Universal Serial Bus (USB) is a communication interface that allows devices to communicate with a host controller, such as a computer system.

You’re probably familiar with the USB connector and port, whether it’s for charging your phone, uploading images with a USB flash drive, or swapping out peripherals on your work computer.

Because of its improved performance, greater speed, and more efficient power management, many modern computers and other electric devices now use a USB 3.0 connector instead of a USB 2.0 port.

The precise differences between different versions can be difficult to understand – but they aren’t as complicated as they appear at first glance.

What Is USB 2.0?

A 2.0 device first recognizes itself as a full-speed device, then uses chirps to negotiate with the controller. When the controller recognizes the device as a high-speed device, it resets the connection and uses high-speed signaling.

It was released in 2000 with the goal of providing faster speeds, increased data handling capabilities, and improved overall performance.

USB 2.0 is the second generation of USB devices that may possibly attain up to 40 times the speed at 480Mbps.

USB 2.0 must be backward compatible with USB 1.0, which implies that even if you have a 2.0 USB port, your USB 1.0 mouse will work fine.

The ports and cables for USB 2.0 are color-coded black and used by some mobile phones and external hard disk drive (HDD) cables.

What Is USB 3.0?

USB 3.0 is the third version of the USB standard for connecting and transferring data within computers and peripheral devices. It was introduced in November 2008.

It’s also known as SuperSpeed USB since it can carry data at a rate of 5 Gigabits per second, which is significantly faster than USB 2.0.

In addition, USB 3.0 ports are backward compatible with USB 2.0 ports.  But the linked USB 3.0 device to a USB 2.0 port allows you to have a data transfer speed of USB 2.0. That means in order to have the maximum performance of a USB device you should consider using the same standard.

USB 3.0 is available in two revised versions: USB 3.1 and USB 3.2.

USB 3.0 connectors come in a variety of shapes and sizes, allowing you to connect two devices together. USB Type-A, Type B, Micro-A, and Micro-B have supported connections in the 3.0 standard.

If you’re not sure if your computer has USB 3.0 ports, look at the USB ports themselves. USB 3.0 ports are color-coded blue.

USB 3.1 is the recent USBs standard that supports a C-type connector. It is an improvised version of USB 3.0 with three significant changes in speed, power, and portability. The three changes include a C-type connector that plugs in regardless of orientation, the faster data transfer rate of up to 10Gbps, and the ability to charge any device.

Difference Between USB 2.0 and USB 3.0: USB 2.0 vs USB 3.0

USB 2.0VSUSB 3.0
Second Version of the USB standardBasicThird version of the USB standard
Second GenerationGenerationThird Generation
480 MbpsSpeed5Gbps
blackColor codeblue
Half-duplexType of CommunicationFull-duplex
500 mAPower900 mA
Polling mechanismSignaling methodAsynchronous mechanism
4No. of wires9
Support USB 3.0 portCompatibilityCompletely backward compatible


In conclusion, we can say that the major difference between USB 2.0  and USB 3.0 is speed. The USB 2.0 and USB 3.0 have a data transfer rate of 480 Mbps and 5Gbps respectively. Also, USB 2.0 standard allows one-way communication but the USB 3.0 standard allows two-way communication.

You can use your USB 2.0 devices to your USB 3.0 port and vice versa. To get maximum performance of USB you should use the same standard that is USB 3.0 device must be connected to a USB 3.0 port and the same rule exist for all other standards.

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