Motherboard USB ports problem

Discussion in 'Windows 7 Help and Support' started by jHollaby, Feb 11, 2013.

  1. jHollaby

    jHollaby Senior Member

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    Hello


    My desktop computers USB keep failing. By this I mean all USB devices plugged in stop working simultaneously (all except the keyboard). This happens 2 - 3 times a day. The Computer is about a year old now. It has only started doing this the last few weeks.


    Most of the time it happens, I am not stressing the computer. It can happen when I am just browsing the internet or writing a word document with no other programs open.


    I have a mouse, Keyboard, webcam and a USB (powered) Focusrite Saffire 6 audio device plugged in via USB. The mouse is plugged into the front case port and all the other devices are plugged into the back USB ports. I am only using the USB-2 ports. My motherboard has two USB-3 ports on the back but I don’t use them since all the devices are USB 1 or 2.


    When it happens The Keyboard continues to work but all other devices stop working. I have to use the keyboard to restart the computer to get it back working again.


    Windows 7 64bit
    Gigabyte X79-UD3
    Intel Core i7-3930K
    16 GB memory
    256 GB SSD
    4 x 1 TB HHD
    NVIDIA GTX 570
    Corsair 550w modular power supply


    Any help or ideas would be greatly appreciated.


    Kind regards
    [FONT=&amp]JHollamby [/FONT]
     
  2. Saltgrass

    Saltgrass Excellent Member
    Microsoft Community Contributor

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    I think I would look into the power supply. Those Nvidia cards can request a fairly large power supply as a minimum standard. Having the memory and 4 large hard drives, might be taxing the system.

    Have you tried removing specific USB devices to see if it helps?
     
  3. jHollaby

    jHollaby Senior Member

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    Thanks for the reply.

    I had a feeling it might be the power supply. I do wonder how much power the USB (powered) Focusrite Saffire 6 audio interface draws as well?

    "Have you tried removing specific USB devices to see if it helps?"

    I will try this tomorrow with only what I need (just keyboard and mouse), see if it makes a difference.

    Time to upgrade the power supply I think.
     
  4. bassfisher6522

    bassfisher6522 Essential Member

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    As saltgrass pointed out, your usb bus is powered by the PSU and all devices plug in to those ports draw power, and with all that hardware, I agree with saltgrass. You could use one of those free online PSU calculators that will give you a generalized idea of what wattage you need.

    Thermaltake Power Supply Calculator
     
  5. bassfisher6522

    bassfisher6522 Essential Member

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  6. jHollaby

    jHollaby Senior Member

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    Thanks for the replies.

    I was thinking about the power as I was writing the specs down. I upgraded bit by bit so I was not thinking about the power requirements. Very silly of me.

    I will be investing in a new power supply.

    I am guessing it would be a good idea to get something future proof. 750W? I am not likely to add much to the computer for quite a while.
     
  7. jHollaby

    jHollaby Senior Member

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    Sorry to make such a stupid mistake! I have just opened the case to find the power supply is a Corsair HX650w! Not 550w.

    I don't know what to think now. Is it possible there is still a need for more power headroom, as it were?
     

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