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15 posts


Topic # 98806 6-Mar-2012 22:48
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Hi Guys,

I have a motherboard with two built in USB 3.0 Ports (which work fine)

I purchased a two port USB 3.0 PCIE card (1x slot) the dirvers have installed ok (i used the motherboard CD along with the CD that came with the card) however the ports have no life in them, connecting a device does nothing.

Has anyone had success with this before? There is a application on the Cd called "Host controller utility" when i install it, it says there is no USB 3.0 Host installed on this system.

The card is a no name card with VIA chipset. screenshot of the device manager is attached. any suggestions would be appreciated.

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Uber Geek
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  Reply # 591466 6-Mar-2012 23:35
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Do you have anything listed in an 'other devices' category ?

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Ultimate Geek
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  Reply # 591542 7-Mar-2012 10:12
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the pci usb 3.0 card i got for my work pc needed extra power connected to it (normal molex power connector)  - does your and have you plugged it in?


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  Reply # 591613 7-Mar-2012 11:29
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bagheera: the pci usb 3.0 card i got for my work pc needed extra power connected to it (normal molex power connector)  - does your and have you plugged it in?

I think this is the issue, I emailed the supplier who replied with the same thing, that I should have the power connected before installing the drivers. Bit of a crock really as the notes state the molex power connector is there *if* you want to provide extra power to the ports ie. for charging cellphones etc, didn't think I would need it just for connecting pen drives.

I will need to find myself a molex power extender as I don't have any free connectors long enough to reach the card and I'll report back.

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  Reply # 592999 9-Mar-2012 21:42
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Same happened with mine. A powered USB HDD worked but nothing else.

Annoying thing was I had chopped all the useles molexes off and crimped on sata plugs. stupid cards persisting in an obsolete power connector.


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