The onboard audio on this motherboard is terrible, problems like that are unavoidable. Also, if you listen to an MP3 or such, you will hear a grainy fuzz type sound, I would suggest getting a new sound card (which is what I'm doing). A good sound card to get would be the VOYETRA TURTLE BEACH SANTA CRUZ - OEM , search for it at newegg.com, nice price for a great sound card

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*Oh, and did you have this problem before you updated the driver from the nVidia website?*