Supermicro X7DAE + Windows 7 = high DPC latency

I recently installed Windows 7 on a system with the Supermicro X7DAE motherboard. Once installed, anytime I tried to play any type of audio the sound would crackle. Initial google searches appeared to blame my Creative X-FI sound card. However, upon further testing using the Windows performance analysis tool, the motherboard seems to be at fault. The SMBus controller seemed to be saturating the bus for some reason. Once the device is disabled in device manager, DPC latency and audio return to normal.

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One Response to Supermicro X7DAE + Windows 7 = high DPC latency

  1. John says:

    I have been trying to find out what would happen if I installed windows 7 on this exact motherboard for a month. I finally added that I would be using a xfi soundcard to the search and found this post. Thank you so much for finding this out and even answering a problem that I am going to have. Keep up the amazing work; you are an inspiration to amateur techies everywhere.

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