In my never ending messing about in the bios if you got a configuration that failed it wouldn't let you back into the bios. Press del and it just comes up black dos screen with partial or full Nvidia Raid IDE message. The Home key wouldn't clear it so you had to reset the whole CMOS with the Insert key, meaning setting everything over and over.
Edit; looks like it updated the raid bios so even going back I still get the lockup, any way of reseting this??