post #11 of 11
Try this:

http://smarttechtips.blogspot.com/2012/08/how-to-donwngrade-asus-bios.html
Quote:
Bios FlashBack Method

*How to downgrade bios on x79 and Z77 boards with Asus flash back support :

1- format your flash drive to fat32

2- download the bios version you want to downgrade to from asus website.

3- copy the .rom file to you flash drive

4- Rename the .rom file as follow
Model name Rename the file
P9X79 DELUXE P9X79D.ROM
P9X79 PRO P9X79PRO.ROM
P9X79 P9X79.ROM
SABERTOOTH X79 SABERX79.ROM
Rampage IV Extreme R4E.ROM
Rampage IV Formula R4F.ROM
Rampage IV GENE R4G.ROM
P9X79 WS P9X79WS.ROM

5- now Plug the USB storage device to the white-colored USB2.0 port, then press
the USB BIOS Flashback button/ROG Connect button for three seconds till the
LED begins to blink, then release.

6- Wait till the LED stops blinking, indicating that BIOS flashing has been
completed.

Also take a look here:
http://rog.asus.com/forum/showthread.php?12749-RIVE-BIOS-FlashBack&country=&status=
Edited by xplode-bg - 2/19/13 at 1:56am