USB 2.0 uses a polling mechanism to send or receive data; USB 3.0, on the other hand, uses an asynchronous mechanism, meaning it can send and receive data at the same time. The former has the highest speed or HS as 480 Mbps while the latter is ten times faster than Super Speed or SS offers, 4.8 Gbps. 2.0 has a relatively lower power usage of up to 500mA than 3.0, which offers 900mA to enable better power efficiency with less power for idle states. USB 2.0 handles just one direction of data at any one time, but USB 3.0 uses two forms of unidirectional data where one receives data and the other transmits data. Data transfer speed is limited to USB 2.0 levels when these devices are interfacing; however, USB 3.
|Usb 2.0||Usb 3.0|
|Data transfer rate|
|Fully charges in 7 hours||Takes 5 hours to fully charge|
|bigger and slimmer||smaller but thicker|
Definition of USB 2.0
An evolution of USB 1.1, USB 2.0 is an external bus, also called Hi-Speed USB, to support data rates with a maximum speed of 480 Mbps. It is an extension and is fully compatible with USB 1.1 and uses the same wires and cables. . USB 2.0 offers system builders the ability to connect to high-efficiency peripherals cost-effectively. Its accompanying functions can be included with little impact on the cost of the complete system. It has full forward and backward flexibility with native USB devices and functions with specially developed connectors.
Definition of USB 3.0
USB 3.0 is the third major version of USB (Universal Serial Bus) for connecting computers and electronic devices. USB has an efficient speed mode to transfer data up to 5 Gbits. Its connectors and cables are often different than previous versions of USB. This is the most developed version of USB.
- First of all, the port of the old version is colored in black, while the newer one has a blue charm.
- USB 2.0 can be purchased cheaply compared to USB 3.0
- The data transfer rate offered by 2.0 is 480Mbps while USB 3.0 comes with 4.8Gbps
- USB 2.0 fully charges in up to 7 hours, while USB 3.0 takes 5 hours to fully charge
- Micros USB 3.0 is much wider than 2.0