Solved

Cant boot after BIOS update on ASUS X79 MB

flashed bios on my ASUS X79 MB and now all i get is a 2 second spin of fans......repeatedly. system will not boot/cant get to BIOS. I also have done flashback of BIOS via USB....no luck. I've unplugged all devices and removed battery from MB....same issue!
8 answers Last reply Best Answer
More about boot bios update asus x79
  1. What was the original BIOS version? You night need using the CAP converter.
    As a final option, you can order a BIOS chip and replace the board's one, but I suggest tetsing with the Flashback firstly.
  2. The original bios was 1104...came with the MB. I thought i would get adventurous and upgrade the bios since i was having issues with my mb seeing all of my ram. I have since tried to flashback (just doing the ASUS format like the first bios update and renaming cap to rom...etc.) to the original bios but i get the same....on for a sec...off...on for a sec....off. I have also ordered a new bios chip from eBay...expect to get it within the next couple of days.

    Did I do the Flashback incorrectly?
  3. I think so. What's the exact board model?
  4. alexoiu said:
    I think so. What's the exact board model?


    It's the ASUS Sabertooth X79 TUF mobo
  5. Best answer
    Try this: download the SABERTOOTH-X79-CAP-Converter from
    http://support.asus.com/download.aspx?SLanguage=en&p=1&m=SABERTOOTH+X79&hashedid=RPOIwd0pKLoXnbFV
    under Bios Utilities
    Unzip and rename the SABERTOOTH-X79-CAP-Converter.ROM file to SABERX79.ROM
    Save it on a FAT formatted USB drive.
    Connect the drive to the Flashback port (white), Press the Flashback button for 3 seconds. The led should flash and the process should take few minutes.
  6. alexoiu said:
    Try this: download the SABERTOOTH-X79-CAP-Converter from
    http://support.asus.com/download.aspx?SLanguage=en&p=1&m=SABERTOOTH+X79&hashedid=RPOIwd0pKLoXnbFV
    under Bios Utilities
    Unzip and rename the SABERTOOTH-X79-CAP-Converter.ROM file to SABERX79.ROM
    Save it on a FAT formatted USB drive.
    Connect the drive to the Flashback port (white), Press the Flashback button for 3 seconds. The led should flash and the process should take few minutes.


    I did the cap converter....but do this again WITHOUT a bios entry on the usb drive?

    I did the cap converter WITHOUT a bios on the usb drive....same problem as before...no boot.

    I do believe I bricked my mobo...just bought a Rampage IV Black Edition....thx for the assistance.
  7. You're welcome. A BIOS chip would solve the issue, I guess.
  8. alexoiu said:
    You're welcome. A BIOS chip would solve the issue, I guess.


    Yes....a 3 dollar BIOS chip did solve the problem but I decided to go with the new MoBo which is now giving me more problems!
Ask a new question

Read More

Asus BIOS Boot CPUs