Difference between USB 2.0 and USB 3.0

Most of the people are still using old version of USB (2.0) but USB 3.0 is the latest revision of the Universal Serial Bus which was released in 2008. This new type of USB offers fastest data transfer rates up to 4.8Gbps, It have also increased maximum bus power, improved power management, improved connectors and cables that facilitate the higher transfer speeds with additional power. Implementation of the technology began in 2009 initially with USB 3.0 adapters (PCIe and ExpressCard) to allow installation of the new 3.0 ports into current computer systems. Hubs followed allowing additional 3.0 expansion. PC computers and laptops have slowly been implementing the new standard since 2010, but the new 3.0 ports are expected to be in the majority of all new computers by 2012 when the popular manufacturers make it a standard

Different types of USBs

This chart will show you the major difference between USB 2.0 and 3.0

Specifications	USB 2.0	USB 3.0
Data Transfer Speed	480 MB / second.	4915 MB / second.
Compatibility	Backward compatible (1.1)	Backward compatible (1.1,2.0)
Connector Lines	4 Lines	9 Lines
Data Transfer	One way	Bi- directional
Power capability (mA)	100	900
Release date	April 2000	November 2008
Tagline	Plug and Play	Sync and go