USB+Power+usage

USB Power usage

You may be interested to check the power usage of your USB ports

To do this you must use your Device Manager

With Windows XP, Go to :- My Computer > Properties > Hardware > Device Manager.

Windows Vista:- Start then right-click on Computer > Properties > Device Manager.

Within the Device Manager box, double click on the Universal Serial Bus controllers (it's the very last item on the list). Next double click on the first line that says USB Root Hub. There are multiples of these, but click on the first one listed. Now, choose the Power tab.

Under the Attached Devices area, you will find a list of all the devices you have running through your ports at that moment. You will also be able to view each one's power requirements (in milliamps). A port can handle up to 500mA, therefore if one of your root hubs is close to that 500 mark, you will need to move around some of your devices to other root hubs, in order to ease the load. Today there are available hubs which can turn one hub into multiples, so you may also consider this option.  