EverythingUSB have created a FAQ on what Superspeed USB is (AKA, USB V3 or USB 3.0). The details cover why it is needed, what speeds can be accomplished, what type of connectors will be used as well as backwards compatibility.
Rather then going over too much of what EverythingUSB have written, I will just mention the basics.
SuperSpeed USB 3.0 Details
* Higher transfer rates (up to 4.8 Gbps)
* Increased maximum bus power and increased device current draw to better accommodate power-hungry devices
* New power management features
* Full-duplex data transfers and support for new transfer types
* New connectors and cables for higher speed data transfer…although they are backwards compatible with USB 2.0 devices and computers (more on this later)
The key information here is the transfer speeds that are now needed to cope with the amounts of data we transfer around. When USB was first launched it was fantastic for connecting devices up to your computer. Now we have moved past photos that are 1MB in size and video that’s in HD, it’s not time for something that can cope with that. With speeds up to 4.8Gbps being possible it allows for fast transfers to be done between devices.
For the full list of why’s etc… check out EverythingUSB.
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