Quote: Originally Posted by alphanumeric
Having or not having an extra power connector shouldn't affect the speed. If it's advertised as being USB 3.0 and has the logo it should operate at USB 3 speeds.
Disagree -- a Car will operate at its rated spec BUT ONLY IF YOU PUT GAS IN THE TANK.
I've found even with some external USB 2 devices they won't operate properly - especially through a USB hub unless extra power is supplied -- some external HDD's have a dual USB connector to draw more power from the computer as well.
(Actually you are correct -- My post is merely to say that without sufficient power the device WON'T work -- so this is probably a philosophical difference only. The net result in either case is that the device doesn't work so the speed it should operate at is irrelevant).