USB 3.0, the latest version of USB (Universal Serial Bus), provides better speed and more efficient power management than USB 2.0. USB 3.0 is backward compatible with USB 2.0 devices; however, data transfer speeds are limited to USB 2.0 levels when these devices inter-operate.
||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)
||Polling mechanism i.e can either send or receive data (Half duplex)
||Asynchronous mechanism i.e. can send and receive data simultaneously (Full duplex)
||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.
||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
||Grey in color
||Blue in color
||Smaller in size
||Extra space for more wires
|Max Cable length