IRQ Conflict 980TI and HD Audio Controller

Discussion in 'General Hardware' started by Mechwarrior419, Apr 2, 2017.

  1. Mechwarrior419

    Mechwarrior419 Member

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    IRQ Sharing 980TI and HD Audio Controller

    Hello everyone,

    like the title says I am experiencing an IRQ conflict with my GPU and what I believe is the Nvidia HDMI audio controller. Luckily I'm not experiencing any issues typically associated with IRQ conflicts, but as I understand it modern hardware seldom encounters IRQ sharing conflicts.

    I would appreciate anyones feedback on wether or not this something I should worry about. Oddly when I go to the properties page in the device manager for the gpu and check the resources tab it says no conflicts reported, but if I run msinfo32.exe It shows that my 980 TI is sharing IRQ 16 with HD Audio Controller.
     
    Last edited: Apr 2, 2017
  2. mbk1969

    mbk1969 Ancient Guru

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    What do you mean by "conflict" ?
    It is called IRQ sharing. Not a good thing but not a deadly one. You can use tool from this
    http://forums.guru3d.com/showthread.php?t=378044
    to switch your GPU to the mode without IRQ - to avoid sharing (but if do this you will have to repeat after every new driver installation, bc NV installer reverts card back to IRQ mode).

    If all works fine then you should not worry.
     
    Last edited: Apr 2, 2017
  3. Mufflore

    Mufflore Ancient Guru

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    If there are no problems, it is not a conflict.
    Saying "I am experiencing an IRQ conflict" and then "Luckily I'm not experiencing any issues" are the conflict.

    ps your ram is running awfully slow at 320MHz.
     
    Last edited: Apr 2, 2017
  4. Mechwarrior419

    Mechwarrior419 Member

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    Yes guys I'm sorry I wasn't more clear, IRQ Conflict should really be IRQ Sharing.
    The only reason I was worried is because I was under the impression sharing shouldn't really be happening these days. But I'll give that utility I go and see if I notice any changes.

    And mufflore your absolutely right my ram does seem to be running a bit slow lol.

    Edit:

    I downloaded the utility that you linked but there doesn't seem to be any documentation on how to use it. Could someone possibly shed some some light on this.
     
    Last edited: Apr 2, 2017

  5. Agent-A01

    Agent-A01 Ancient Guru

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    The two 'devices' are on the same PCIe bus.
    Of course the are going to share the same IRQ.

    Anyways, you can use the MSI tool from mbk's thread to easily change devices to MSI mode to ensure that any devices are not sharing IRQs.
     
  6. Mechwarrior419

    Mechwarrior419 Member

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    Yea Agent thats what I figured since the two devices use the same physical slot.

    Right now I'm experimenting with mbk's utility. I forgot to run it with admin priviledges and was wondering why it kept saying 0 devices found.

    When I run it in admin mode the utility now displays the gpu and audio controller. I click the checkbox next to both then I clicked apply however it appears that nothing is being changed. When I click refresh the utility indicates that the IRQ assignments remain at 16 for both devices. I thought they would change to a negative number.
     
    Last edited: Apr 2, 2017
  7. RealNC

    RealNC Ancient Guru

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    It IS what's happening these days. It didn't happen in the past. If two devices shared the same IRQ, it was a conflict and you got crashes, hang-ups, etc.

    Then IRQ sharing was invented and the issue was solved.

    If that bothers you, then switch your GPU from IRQ to MSI mode, as described here:

    http://forums.guru3d.com/showthread.php?t=378044
     
  8. Mufflore

    Mufflore Ancient Guru

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    Reboot.
     
  9. mbk1969

    mbk1969 Ancient Guru

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    Do not switch all devices at once, because you can receive BSOD at boot stage.
    Do not touch SATA controllers with MS drivers if you are in Win7, Win8 - they do not utilize MSI mode and will give BSOD.
    Do not bother with USB2 controllers - they do not utilize MSI mode and just ignores the setting.
    After you checked device in MSI utility and rebooted test device for a correct functioning.
     
  10. tsunami231

    tsunami231 Ancient Guru

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    correct me if i wrong but the gpu audio (HD audio Controller) which used for HDMI use same irq cause they basicly the same device?

    Now if say your On board sound card or dedicated sound card are on same irq as the GPU then i could see problem,

    I mean granted you can force the gpu driver in to MSI mode and wont be sharing but it still the same device?
     
    Last edited: Apr 3, 2017

  11. mbk1969

    mbk1969 Ancient Guru

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    May be not. They definitely do not share drivers, they can have different I/O ports and memory ranges (at work now so can`t check that). So from OS point of view they can be two different independent devices.
     

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