If it disabled by default leave it that way. There is a lot of things you don't touch in the bios. Unless you are a expert on the bios there is really only a few things you change. I have been this for over 30 yrs. Don't screw with things in the bios unless you really know what they do. Here a link that might help or not.http://www.analog.com/en/design-center/landing-pages/001/beginners-guide-to-dsp.html