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Usb: Motherboard Or Pci?


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#1 Slackenerny

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Posted 13 April 2008 - 03:47 AM

I have a few problems re. USB and hope if someone could be able to help.

I'm running XP SP2 with the latest updates installed. The motherboard is ASUS P4B533E. It comes with 3 USB hubs (6 ports altogether). On one of the ports I've plugged in an USB Microsoft Internet Keyboard Pro. Sometimes when I plug in an USB device (like an external USB harddrive, on a different port on the motherboard, that is not on the ports with my USB keyboard) it will disconnect on its own (you can hear that sound Windows does when an USB device is plugged and unplugged) for no particular reason and then very soon afterwards (about 4 or so seconds) it will reconnect itself again. Sometimes this will keep on happening if I maintain the USB device to be plugged on the port until a balloon pops up on the system tray saying the data transfer speed of the USB device has to be dropped to USB 1.1. The problem with this is if I want to do a harddrive backup and it disconnects itself in the middle of the process it is very annoying. Recently I've also bought a Dlink DWL-G122 USB Wifi adapter and this connecting/disconnecting problem reappeared and I'm unable to maintain a reliable internet connection. I've tried reinstalling drivers (about a million times) and unchecking the box under the power management tab in the USB settings in device manager. I suspect that this problem is to do with my USB hubs on the motherboard unable to maintain a steady power supply. Does anyone have any idea as to why this happens, please??

I've heard from a friend that a PCI to USB card often works better and is more reliable. Any substance to this claim?

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#2 dc3

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Posted 13 April 2008 - 11:40 AM

Does this happen if you change to a different USB port?

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#3 garmanma

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Posted 13 April 2008 - 11:53 AM

I had USB problems off and on. I added a PCI-USB card. Not only did I get more ports, but it fixed the one giving me problems. I recommend it
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#4 Slackenerny

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Posted 13 April 2008 - 12:01 PM

It happens to all 6 ports, although somehow I feel two of the ports perform a tad better (i.e. it doesn't disconnect as quickly).

Does this happen if you change to a different USB port?



#5 dc3

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Posted 13 April 2008 - 01:07 PM

Garmanma's suggestion is a good work around to this problem, and is not very expensive to do. If you have a spare PCI slot I would go for it.

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#6 GaryT85

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Posted 17 April 2008 - 08:09 AM

sometimes this can be a power issue, and adding a PCI card to run the slots draws it power from a different source...kind of

they are cheap as chips anyway, so you might as well see if it helps :thumbsup:

#7 Slackenerny

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Posted 17 April 2008 - 08:15 AM

Thanks very much folks. I think I'll go for it, since price of USB/PCI card isn't very dear, worth a shot. I think it's more to do with my inertia to go shopping. :thumbsup:




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