Originally Posted by aHumanBeing
Just to make sure, is your motherboard infact running on a point and click style UEFI or is it the old school blue screen bios?
The 990XAUD3 is EFI compliant, but it is menu driven ala "old school BIOS".
If you are planning on flashing it, try QFlash from the BIOS page, and sorry if I didn't say this earlier, but that method of forcing the board to fail it's main firmware and check the backup has a chance of not working. It may take a few tries, I remember reading about that a while back on the Gigabyte forums whilst looking for a way to flash the backup BIOS (ALT-F12 trick DOES work on this board), to force a restore, it's ALT-F11, but the power cycling method is the only hope if it's being a brick.
Though, if it was working and you haven't changed a single thing- and it just up and quit on you, I'd look into RMAing it personally. Or at least, I wouldn't trust it, but I am picky.
EDIT: The files for the BIOS-ROM come in a 7ZIP SFX archive, extract it and you will get 3 files, the one that matters is named "990XAUD3.F**", copy that to a FAT16/32 (HAS TO BE FAT!) flash drive, or HDD partition, boot into your BIOS and enter QFlash. Select "DMI Data: Disabled" and "CMOS Default: Enabled" and then update from that file you put on the FAT drive.Edited by mezmenir - 7/17/12 at 1:13pm