USB 3.0 cable is not only having higher rate, but also supply more power. There are large numbers of digital products through a USB interface to charge it the marketing today. So developers progress USB 3.0 cable power supply capacity to meet the requirment which substantial progress from 100mA to 900mA or so. This means that mobile hard disk will have less to additional power supply and passive USB-Hub can connect more devices.
Two-way transmission
USB 2.0 cable can not input and output simultaneously work, that is, it can not be output when inputting the signal. In the 5 lines growth of USB 3.0 cable, two are for the output of data, and other four lines can be two-way simultaneous transmission. This two-way transmission mode of USB 3.0 cable will greatly increasing the speed such as synchronization information phone or data backup.
Energy efficiency
USB 3.0 cable introduced higher energy-efficient power supply protocol standards that abandoned equipment polling mode, shifting to interrupt mode. In layman's terms, the USB 2.0 cable mode, even if the USB connection in the non-movement or standby mode, USB bus control device still needs to periodically check whether the device needs to transfer data. In the mode of USB 3.0 cable, the device can be complete stand-off the connection of USB and send an interrupt signal to tell the control device start data transfer when it needs to restore self-restraint devicel. Of course, USB 3.0 cable is still backward compatible with USB 2.0 cable mode.
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