REALTEK High Definition Audio - version 1.97
http://www.station-drivers.com/page/realtek.htm
Entering the version 17 (Final) bios still works (somewhat) when in Intel Raid mode + USB keyboard, but is still very "touchy" on the exact moment during boot-up that the "Del" key is pressed, for the bios screen to appear. I also agree that Abit needs to provide a fix.