What is USB 2.0

USB stands for Universal Serial Bus. It is an industry standard for high speed serial data communications between computers and peripheral devices. USB 2.0 is a popular version of USB developed to improve on the performance and reliability of older versions of the standard which were USB 1.0 and USB 1.1. USB 2.0 is also known as USB Hi Speed.

The old standard of USB was 1.1, and allowed a maximum speed of 12 megabits per second i.e. approximately 1.5 megabytes per second. Considering todays scenario, the file transfers are to be made which consists of large sizes. For Example – if a user wants to transfer a movie file (say 700 MB’s) then the old 1.1 standard would consume around 8 minutes which is quite a large wait considering today’s scenario. Whereas, on the other hand, the USB 2.0 can perform as fast as 480 megabits per second (approx. 57 MB per second) which results in copying the movie file in just 11 seconds which is just a huge improvement over the old USB format.

The original specification for USB 2.0 is 60MB/s or 480Mbit/s raw data rate which is fastest and was designed to transfer data across the wire. Prior to 2005, USB 2.0 was pretty speedy for most purposes. The specification exists for a few years.

USB 2.0 products (including cables and hubs) feature a Certified Hi-Speed USB logo on their packaging. The product documentation should also reference USB 2.0. Computer operating systems can also display the name and version strings of USB products through their device control screens.

One problem with the USB 2.0 host controller is that, if there are no free slots present on the motherboard for installing USB 2.0 device, then the user may need to purchase a new system and then also may have to free up the space by removing an unused disk drive which may be present on the motherboard for having USB 2.0 hardware.

Otherwise, the USB 2.0 is installed only where there is a USB 2.0 hardware installed on the computer. If a USB 2.0 device is connected into a computer which is without USB 2.0 hardware then the system automatically shows the notification for not having the driver supported to run the USB 2.0 device.

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