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USB drops out periodically

Discussion in 'Hardware' started by screamingbadger, May 26, 2012.

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  1. screamingbadger

    screamingbadger Thread Starter

    May 26, 2012
    Tech Support Guy System Info Utility version
    OS Version: Microsoft Windows 7 Enterprise, Service Pack 1, 64 bit
    Processor: Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz, Intel64 Family 6 Model 42 Stepping 7
    Processor Count: 4
    RAM: 16301 Mb
    Graphics Card: AMD Radeon HD 7970
    Hard Drives: C: Total - 114470 MB, Free - 47155 MB; Free - 340549 MB;
    Motherboard: Gigabyte Technology Co., Ltd., Z68XP-UD3
    Antivirus: Microsoft Security Essentials, Updated and Enabled

    Hey, guys
    I'm an IT guy, I build all my own machines and have done so for 20 years, but I'm stumped and frustrated. Every so often my USB mouse and keyboard will flicker off and on (the power to them). I'm using a Logitech G5 mouse and a standard Dell keyboard. When it starts happening, the mouse and keyboard are both useless. The PC doesn't seem to be affected. It doesn't lock up, doesn't reboot, etc, it stays stable. Sometimes you hear the USB removal/addition tones, sometimes not.

    I have a generic Dell mouse that I plugged into a different USB port that remains unaffected while all this is going on. If I put the PC into sleep mode and bring it back up, it immediately works fine again.

    This could happen when the system is under stress such as when I'm gaming, or it could be when I don't have anything but a Word doc and a browser window open.

    I've replaced the motherboard, everything else on the box is new. I talked with the power supply guys but they don't think it's the power supply since nothing else is affected.

    Any ideas at all what could cause this?

    Thanks in advance.
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