On September 18, 2007, Pat Gelsinger demonstrated USB 3.0 at the Intel Developer Forum. USB 3.0 is targeted at ten times the current bitrate, reaching roughly 4.8 Gbit (600 MB/s) by utilizing two additional high-speed differential pairs for "Superspeed" mode, and with the possibility for optical interconnect. The two new differential pairs make the cable about as thick as an ethernet cable and provide full-duplex transfers.The USB 3.0 specification was 90% complete as of August 13, 2008 and commercial products are expected to arrive in 2009 or 2010. USB 3.0 is designed to be backwards-compatible with USB 2.0 and USB 1.1 and employs more efficient protocols to conserve power while increasing the maximum power available for connected devices.
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