Difference Between USB 2.0 and 3.0

The main difference between USB 2.0 and 3.0 is that USB 2.0 offers a data transferring rate of 480Mb/s while USB 3.0 offers a data transferring rate of 4.8 Gb/s, which is 10 times higher than USB 2.0.

USB stands for Universal Serial Bus. It is an industry standard. Most importantly, it defines cables, connectors, and protocols for connection, communication and power supply between personal computers and their peripheral devices. USB 2.0 and 3.0 are two standards of USB.

Key Areas Covered

1. What is USB 2.0
      – Features and Functionality
2. What is USB 3.0
     – Features and Functionality
3. Difference Between USB 2.0 and 3.0
     – Comparison of Key Differences

Difference Between USB 2.0 and 3.0 - Comparison Summary

What is USB 2.0                                                 

USB 2.0 is an old standard of the USB released in 2000. Its data transferring rate is 480 Megabits per second (480Mb/s). This means, if the user has a 10GB file, it will take around 3 minutes to transfer that file. Furthermore, USB 2.0 provides 0.5A current to the connected devices. Since data transmission in USB 2.0 occurs in half-duplex, it is possible to send or receive data at a time.

What is USB 3.0

USB 3.0 is a newer standard of the USB released in 2008. Its data transferring rate is 4.8 Gigabits per second (4.8Gb/s). Therefore, it is 10 times higher than the USB 2.0. For example, if the user has a 10GB file, USB 3.0 only takes around 20 seconds to transfer that file. Moreover, USB 3.0 provides 0.9A current to the connected devices.

Difference Between USB 2.0 and 3.0

Figure 1: USB Port

If the user has a USB 3.0 device and if he connects it to a USB 2.0 port it will not be possible to get the required performance. Therefore, it is important to connect that device to USB 3.0 port to achieve the maximum speed. In addition, the data transmission is full duplex. In other words, it is possible to send and receive data simultaneously between the connected devices.

Difference Between USB 2.0 and 3.0

Definition

USB 2.0: A hardware serial interface to connect peripheral devices to computers and other electronic devices

USB 3.0: Third major version of Universal Serial Bus standard for interfacing computers and electronic devices

Data Transmission Rate

USB 2.0: Provides a data transmission rate of 480Mb/s

USB 3.0: Provides a data transmission rate of 4.8Gb/s

Data Transmission Method

USB 2.0: Can send or receive data at a time (Half duplex)

USB 3.0: Can send and receive data simultaneously (Full duplex)

Current

USB 2.0: Provides a current of 0.5A at 5V to the connected device

USB 3.0: Provides a current of 0.9A at 5V to the connected device

Released Year

USB 2.0: In 2000

USB 3.0: In 2008

Price

USB 2.0: For a similar product, it is cheaper than USB 3.0 version.

USB 3.0: For a similar product, it is expensive than USB 2.0 version.

Conclusion

The difference between USB 2.0 and 3.0 is that USB 2.0 offers a data transferring rate of 480Mb/s while USB 3.0 offers a data transferring rate of 4.8 Gb/s, which is 10 times higher than of USB 2.0. USB 3.0 device should be connected to USB 3.0 port to achieve the maximum speed.

Reference:

1. “USB Explained (Official Dell Tech Support)”, TechSupportDell, 11 Nov. 2016, .
2. “USB.” Wikipedia, Wikimedia Foundation, 4 May 2018, .

Image Courtesy:

1. “USB Connector” By Aidan C. Siegel – Own work via

About the Author: Hasa

Hasa has a BA degree in English, French and Translation studies. She is currently reading for a Masters degree in English. Her areas of interests include literature, language, linguistics and also food.

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