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