1. #1

    Unhappy Ndis.sys (And to some extent usbxhci.sys) cause massive DPC latency

    Hello there, everyone.

    I've been struggling for the past weeks (months) in trying to find a solution to the insane amounts of DPC latency upgrading to windows 10 has caused upon my system.
    With various DPC latency monitoring software, I've managed to pinpoint Ndis.sys having upwards of 85000 microseconds of latency and usbxhci.sys coming to about 2000. All other sources seem 'fine' at about 800 maximum.

    If I disable my network card in the device manager, the massive 86k+ spikes disappear, as they do when there is no internet related activity going on.
    other than that the latency is consistently at around 1000 microseconds, which I believe is still too high.

    Is there anything I can do to improve this simply unacceptable latency? my computer is constantly stuttering whenever I play online videogames/videostreams.
    If I need to post any logs let me know, I'm not sure what I should add/upload in advance without making the post a giant wall of text.

    CDC.


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  2. #2
    jcgriff2's Avatar
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    Re: Ndis.sys (And to some extent usbxhci.sys) cause massive DPC latency

    Is your BIOS updated?

    Are you using a 3rd party firewall? Internet Security Suite?

    If so, remove it and see if things improve.

    Use the appropriate removal tool, if applicable - Uninstallers (removal tools) for common Windows antivirus software—ESET Knowledgebase

  3. #3

    Re: Ndis.sys (And to some extent usbxhci.sys) cause massive DPC latency

    Quote Originally Posted by jcgriff2 View Post
    Is your BIOS updated?

    Are you using a 3rd party firewall? Internet Security Suite?
    My MOBO (An ASROCK Z77pro4) is a 3 month old purchase, but the BIOS hasn't been touched since 2013 and is therefor 'up to date'.
    The issue has existed ever since I upgraded to windows 10, and I'm not running any 3rd party firewalls.

    Is it possible I might just have to buy a new WLAN pcie card? If so what kind of a model should I look into? I really don't wish to upgrade to a NEW MOBO, it was quite a pricy pickup and it's only a few months old. :/

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