USB 3.0 is on the horizon and some hardware and required accessories like cables and add-in cards will be seen at CES 2010 in a few weeks. SuperSpeed 3.0 is backwards compatible with USB 2.0 so all of that stuff you have connected to your computer will continue to work with USB 3.0.
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If you want to take advantage of the new USB 3.0 speeds though you will need some new cables to go along with your USB 3.0 add-in card. Accell will be showing off a very long USB 3.0 cable at CES that provides a 5Gbps signal rate with a length of 20 feet.
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The long cables use an active technology to keep the signal strong and reduce degradation at long lengths. The active technology requires no external AC adapter. The cables will be offered in 1, 2, 3, 4, 5, and 6-meter lengths with prices starting at $19.99. That super long one will be expensive. The 4, 5, and 6-meter lengths use the active tech.