USB 3 is still new to dell systems, I would have a guess that it is USB 2. Are you sure it is a XPS 900, can't find a manual for that system.
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For USB 3.0 you should have something like the following:-
USB 3.0 Extensible Host Controller,
USB 3.0 Extensible Root Hub.
Listed in the Device Manager, under the Universal Serial Bus Controllers.
Also, the USB 3.0 port will be coloured Blue and if you don't see USB 3.0 listed in the USB Controller section, you don't have them
If my answer was helpful, please click: KudosForum Member since 2001I am not employed by Dell
OOPS! It keeps getting cut off! :emotion-12:
Studio XPS 435T / 9000 ??
Forum Member since 2004 I am not a Dell employee