Originally Posted By: rikkisbears
Thanks Guys,
I don't actually have the audiophile version, so, I checked the plugs on the usb drives that I do have.
Sort of got a bit confusing as an old Seagate back up drive I have, only had a single plug at one end, whereas the pg usb's have a double.


The USB 2.0 standard limits current to a maximum of 500 milliamps (1/2 amp). In fact many front panel USB 2.0 connections are limited to 100 milliamps (1/10 amp) of current to avoid accidentally popping motherboard fuses while plugging and unplugging USB connections. Many external drive and enclosure manufacturers supply USB 2 cables with two connectors. Only 1 connector is needed for communication but the second is provided in case two connections are needed to provide enough current.

The Wikipedia photos Trevor posted are nice. Another easy way to tell if a connection is USB 2 or USB 3 is by the color of the plastic inside the connector. USB 2 uses black or white plastic. The USB 3 standard states the plastic color must be blue as shown in the photos.


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