- USB 2.0 is capable of providing up to 500mA current; whereas USB 3.0 is capable of providing up to 900mA current.USB 2.0 offers a one – way communication path. That means it can send data or receive data at a given time but not do both.USB 2.0 has Max speed about 480 Mbps. It is Older and slower than USB 3.0. It has Maximum Cable length of 5 meter and total number of wire within the cable is 4. USB 2.0 is generally less expensive than the USB 3.0.
- USB 3.0 was released in November 2008 .USB 3.0 has gradually become the new standard for USB devices by providing a lot of improvement over 2.0. USB 3 is usually colored Blue on inside to distinguish it from USB 2. USB 3.0 transfer speed is 4800Mbps. This means USB is approximately 10 times faster than USB 2.0. USB 3.0 offers two separate unidirectional data paths, each with a dedicated function; one for sending data and the other for receiving data. This means USB 3.0 can simultaneously send and receive data. This 3.0 also provide more efficient power management and increase delivery. It has Maximum Cable length of 3 meter and Number of wires within the cable is 9.