Friday, 29 July 2016

Different Between USB 2.0 and USB 3.0 (Which is Best)


USB 2.0
USB 3.0
Released
April 2000
November 2008
Speed
High Speed or HS, 480 Mbps (Megabits per second)
10 times faster than USB 2.0. Super Speed or SS, 4.8 Gbps (Giga bits per second)
Signaling Method
Polling mechanism i.e can either send or receive data (Half duplex)
Asynchronous mechanism i.e. can send and receive data simultaneously (Full duplex)
Price
For a similar product, the USB 2.0 version is generally less expensive than it's USB 3.0 version.
For a similar product, the USB 3.0 version is generally more expensive than it's USB 2.0 version.
Power Usage
Up to 500 mA
Up to 900 mA. Allows better power efficiency with less power for idle states. Can power more devices from one hub.
Number of wires within the cable
4
9
Standard-A Connectors
Grey in color
Blue in color
Standard-B Connectors
Smaller in size
Extra space for more wires


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