If you’ve ever connected a media player to your laptop to sync up a
few gigabytes of music and movies, only to spend the next eight hours
waiting … waiting … waiting for the job to complete, you’re the number
one candidate for USB 3.0.
USB 3.0, as the name implies, is the third major version of the USB
standard, perhaps the most successful, universally-adopted connector
format in the history of computing.
USB is beloved for its simplicity, its ability to charge
battery-powered electronics connected through it, and phenomenal
availability among thousands of devices – not just computer peripherals
but also consumer electronics galore.
That is, until you find yourself in the fourth hour of that
eight-hour synchronization slog. Then USB becomes a pain instead of a
savior.
And that’s the main issue that USB 3.0 (also known as SuperSpeed USB)
was designed to address, pumping up the maximum throughput of USB from
the 48Mbps of USB 2.0 to the 480Mbps of USB 3.0.
That alone solves a lot of problems, but USB 3.0 also has another
trick up its sleeve: The ability to charge more power-hungry devices
than USB 2.0 could. USB 2.0 could provide up to 100 milliamps of power
to gadgets connected via the connector. That was fine for the cell
phones of 2004, but in 2011, USB gizmos often need so much juice that
they can’t charge via USB 2.0. Most tablets won’t charge at all via a
USB connection, and those that do will usually only “trickle charge,” an
agonizingly slow operation that can take all day.
USB 3.0 bumps power output up to 900 milliamps, providing power aplenty for just about anything you could think to throw at it.
Best of all, in keeping with USB’s history, USB 3.0 is backward
compatible with USB 2.0 devices. In other words, if your computer has a
USB 3.0 port, you can still plug a USB 2.0 hard drive into it – and vice
versa – though in both cases the connection will operate at the slower,
USB 2.0 speed.
While USB 3.0 was introduced last year, support for it remains
spotty, and even computers that feature USB 3.0 ports tend to have only a
couple instead of a full bank of four or more. Still, that support is
coming, however slowly. USB 3.0 is on its way to everything – it’s just
taking its sweet time getting there. Which, oddly, is so
unlike the zippy USB 3! (http://www.pcworld.com/article/242483/usb_30_three_times_the_awesome.html)