Easy Guide How to Downgrade ASUS Bios for all UEFI Motherboards

Easy Guide How to Downgrade ASUS Bios for all UEFI Motherboards



This guide is fully tested on several motherboards (dram speed and cpu ratio are adjustable after downgrading)


Things you will need :

1- Bootable MS DOS USB stick.
2- Afudos Utility 4.xx (UEFI).
3- Asus BUPDATER.


NOTES :

1- Make sure to download the the correct bios for your board Flashing your bios with the
    wrong bios version may lead to a dead board.

2- Interrupting the updating process may lead to a dead board.

3- Dont downgrade your bios unless you are having some serious problems with your
    current bios version.

4- if anything went wrong while flashing your bios then dont restart your computer unless you had a successful bios flash.


* Steps to Downgrade your Bios :

*if you are having a x79 OR Z77 board with Asus flash back support click here

1- Download HP USB Disk Storage Format tool 
2- Download Windows 98 system boot files 
3- Extract the files .
4- Run HP tool (run as administrator if you are using windows vista or later).



1- Choose your flash drive 
2- Choose Fat32
3- Check Create a Dos startup disk option.
4- Choose the extracted windows 98 system boot files Folder 
5- Press START . WARNING ! All files on that flash drive will be removed so make sure
    you backup all your data before formating.


5- NOW you have successfully made your MS-DOS Bootable flash drive.

6- GO TO ASUS website and download the bios version you want to downgrade to and also
   download any older bios Version  NOTE : we will flash the bios twice once with the
   older bios version using afudos utility and the second time with the newer bios version
   (which is the Bios version you want to downgrade to) using Asus BUPDATER.

SO for example , if you want to downgrade to 2303 then you will downgrade your bios to 2103 first using afudos and then upgrade to 2303 using bupdater ,you can skip that step if you want and downgrade directly to the version you want using afudos (BUT DO IT ON YOUR OWN RISK).

7- name the older bios version "First" and the newer one "Second" 

8- Now copy them to your flash drive.

9- Download AFUDOS 4.XX 

10- Extract the files.

11- Now goto amiflash/Aptio/AFUDOS and Extract AFUDOS.rar

12- Now Copy AFUDOS.EXE to your flash drive.

13- Download Asus BUPDATER

14- Extract the files 

15- And now copy BUPDATER to your flash drive.

14- Now your flash drive should be something similar to this.


15- Now Restart your Computer and Enter Bios Setup by pressing the Delete key from your
      keyboard .

16- Now change boot priority to boot from your flash drive .




17- Note (now we will flash the bios with the older bios version First.rom)
      type AFUDOS FIRST.ROM /P /B /N  


18 -  it may gives you an error message that says : PI Version in SYS ROM mismatched PI
        Version in  ROM File! Force update it may be destroy the System BIOS (DONT panic
        its okay just press " F ") then it will ask you to confirm your choice so press " Y "




19 - DONT INTERRUPT THE PROCESS it will only take few seconds so be patient.

20 - AFTER it finishes Type BUPDATER /isecond.rom 



this Command will flash your bios with the newer bios version (the version you want to  downgrade to ) using asus bios utility.

21- NOW TURN OFF YOUR COMPUTER AND RESET CMOS ( DONT SKIP THIS STEP )

     there are so many ways to reset CMOS one of the easiest is to push the reset CMOS
     BUTTON at the back of your case for 5 seconds (usually you will find it above the audio
     jack inputs) (CHECK you motherboad manuel) or CHECK this video Reset CMOS

22- now turn on your computer and restore defult BIOS settings and restart.  

23- and now you have successfuly downgraded your bios.

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                                       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.


                           JUST LET ME KNOW IF YOU NEED ANY HELP I would love to hear your feedback guys .

                                                Comment and SHARE ! :D




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