Faster: Ten times faster than USB 2.0 and six times faster than FireWire 800
Greater power efficiency: New interrupt driven protocol optimizes power management.
Better Power Output: Power output bump to 900 milliamps from 100 milliamps allows more devices to be charged faster via USB.
Backward Compatible: New Connectors and cables will work with work with devices running the older USB 2.0
The new spec will support data transfers at 4.8 gigabits per second (Gbps), nearly ten times faster than the current standard's 480 megabits per second and six times faster than FireWire 800. It's also 400 times faster than the 12Mbps offered by the original spec, USB 1.0.
USB 2.0 is also known as "Hi Speed USB," while USB 3.0 will have the confusingly similar moniker "SuperSpeed USB."
The new USB 3.0 connectors and devices will be compatible with older USB ports (on devices using USB 2.0 and 1.0) but they will be limited to the older ports' slower speeds.
The first USB 3.0 devices probably won't show up until the end of 2009 or early 2010, say analysts. But users can get a glimpse into future devices sporting SuperSpeed USB as early as the annual Consumer Electronics Show in January.
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