There are no drivers available for this motherboard since it only supports Windows XP or Vista.
Please check the following link for this information http://www.intel.com/support/motherboards/desktop/sb/CS-008326.htm
I have a lot of colorful language for SigmaTel / IDT audio driver packages since they are usually customized to a manufacturer / series of mainboard. However, try the one located in the download section for the DG965RY that states compatibility with Windows Vista: https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=13706&lang=eng&ProdId=2377
Gize thanks a lot for sharing this information with us and with other users.
Hey Giza thanks a lot for sharing!