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Old 11-21-2007, 09:12 PM   #1
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Powering USB

I have a 7-port USB HUB that needs power. How do you power the USB? A few weeks ago I fried a USB hub because I spliced the supplied power adapter and hook it up to the 5V line on the M2-ATX. I guess it doesn't work that way. How are you powering your USB because my external DVD player needs it.

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Old 11-22-2007, 12:08 AM   #2
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I use a 4 port powered hub, I have taken the power from a the 5v line of a 4 pin molex cable (red+ground).
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Old 11-22-2007, 12:17 AM   #3
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What amperage did your hub can handle?
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Old 11-22-2007, 09:28 AM   #4
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The power adapter which accompanied the hub is rated at 1.2amp output. I would assume 1.2-1.5amp could be handled with ease. I use it for a griffin powermate, touchscreen and dvd drive (dvd drive is also powered through the 5v line to the hub.
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Old 01-04-2008, 12:17 PM   #5
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there's some hubs that doesn't need extra power:
http://www.targus.com/us/product_det...sp?sku=ach74us

does it hold back the performance then if it hasn't got external power source?
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Old 01-04-2008, 09:03 PM   #6
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The limitation is in what you can connect to the hub. Some USB items require the total amperage of the port, where as a single USB port only outputs 0.5A of power. So if you have a few items that need the 0.5A you will come up short and weird things will happen.
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