Aug 11, 2011

USB 3.0 gains 100w/power. Why not call it USB 4.0?

There's a plan to change the USB 3.0 specification to provide up to 100 watts of power to connected devices.  I can see why the USB consortium would want to compete with Thunderbolt, Intel & Apple's new spec for connecting external devices to computers. But Thunderbolt only supplies 10W of power, and is only available on a handful of devices by Apple and possibly one or two peripheral manufacturers - that's hardly something to get worried about. Why would they call this USB 3 and not USB 4? Won't it be confusing if some USB 3 ports can power devices, and other USB 3 ports can't?


You make a good point. Since USB 1.0 ports and USB 2.0 ports have different colored jacks (black vs. blue), I'm not sure what USB 3.0 would do to differentiate itself. I don't have any USB 3.0 compatible peripherals, or built-in support on any of my pc's. So it's not like I've lost anything if they decide to change the standard. I would assume most people are like me and only have 1.0 and 2.0 support on their computers, so it's not like much is lost by improving their standard.

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