That MB is out of warranty and no longer updated/supported long ago. You might check the MB online product page for a 'Vista' driver which should work with Windows 7. It is possible the device is old and not compatible with Vista/Windows 7.
Something like this or similar:
Compatible with: Windows 7/Windows 98/2000/Server 2003/XP/Vista 32/64bit
I'm also using D865GBF (without a graphics or sound card) and have been looking for WINDOWS 7 Audio , graphics, Onboard LAN and .ini drivers for around a month on net. Will appreciate if you could let me know which ones u r using.
Also what do i need to buy so that my system will support HD & HiQ.