100% CPU usage + No HDMI audio for ATI HD2600 video card RRS feed

  • Question

  • The notable information about this problem is that:

    1)      No HDMI audio device in Vista, 100% cpu usage attributed to “hardware interrupts”

    2)      The problem only occurs on Windows Vista. (same hardware running XP and there is no problem, suggesting software/driver cause)

    3)    Upon disabling the video card's on board audio controller in device manager, CPU usage returns to normal.

    4)      It effects 2400, and 2600 cards. Perhaps others.

    5)      Happens on different motherboards (some MSI, some ECS, all using the ATI SB400 chipset)



    Several other people have reported the exact same issue here:




    and also here:




    Newest BIOS, newest chipset drivers, various versions of display drivers including latest offer no solution. 


    I notified ATI via a support ticket about this problem in August, and in December they finally told me that I should take it up with my motherboard supplier and that they wouldn’t be working on it.


    I had already contacted MSI (my M/B supplier), and they seem to be ignoring me for the last few months now.  


    I have also filed a ticket with Sapphire (company who branded my card) a week or so ago, to which I have received no reply.


    I also submitted this information to “ATI Catalyst Crew Feedback” with no results.


    Lastly, I am now also informing Microsoft of the problem.



    Is there anything that anyone might suggest I do further?


    I feel it is ridiculous that I as an End User have to expend so much effort and time to get someone at ATI to take responsibility for this. The card says “Vista compatible” on the box, yet clearly this is not 100% true.




    Monday, March 3, 2008 11:48 PM


  • Hello,


    As for this high CPU issue, we generally need to analyze the performance monitor logs and memory dump files to locate the root cause. Unfortunately, debugging is beyond what we can do in the forum because of the nature of forum support. A support call to our product service team is needed for the debugging service. I'd like to recommend that you contact Microsoft Customer Support Service (CSS) for assistance so that this problem can be resolved efficiently. To obtain the phone numbers for specific technology request please take a look at the web site listed below:




    If you are outside the US please see http://support.microsoft.com for regional support phone numbers.


    Besides, based on your description, I still recommend you to keep contacting the motherboard and video card manufacturer, who should be the best support resource for this issue.



    Lionel Chen

    Microsoft Online Community Support

    Thursday, March 6, 2008 3:57 AM