Asus p9x79 pro USB flashback bios button

Kickakangroo

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Nov 7, 2013
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Recently purchased an Asus p9x79 pro and an i7 4820k processor. But it wouldn't boot and just gave error code 00 along with a continous red led CPU light. Tried taking out and putting the CPU back in and it did nothing. So finally trying to update the bios using a USB flashback but the button doesn't light up and the motherboard doesn't respond. Anyone else have this problem or have a solution?
 
There is a thin white sticker on the motherboard with the serial number on it. The last four numbers on the sticker are the number of the BIOS version the motherboard shipped with. Depending on what your current BIOS is, follow the instructions in the Guide to update the BIOS.

Guide to USB BIOS Flashback
http://event.asus.com/2012/mb/usb_bios_flashback_guide/
 


Specifically speaking for the P9X79 PRO in this response!!!

When using the Asus BIOS Flashback, a few critical steps that a lot of ppl are finding confusing:

1) Check the BIOS version that is currently on the motherboard prior to doing ANYTHING!
a) If you are unsure what BIOS version your board has by default, you can find it in the last four numbers on the long sticker bar code on the motherboard itself (e.g. follow the arrow in the pic here: http://www.ricp.net/p9x79pro/p9x79pro1.jpg )

2) If your BIOS is OLDER than 2104, then download the P9X79-PRO-CAP-Converter.zip file from the Asus Support BIOS UTILITIES from the drivers section for the P9X79 PRO.
a) Unzip the contents.
b) Read the pdf file.
c) Rename the file "P9X79-PRO-CAP-Converter.ROM" to "P9X79PRO.ROM"
d) Put the file (AND ONLY THE FILE) on a FAT16 or FAT32 USB Drive (NOTE: 8GB Maximum USB Drive).
e) Insert USB Drive into Flashback slot, hold BIOS FLASHBACK button for 3 seconds, and wait for the lights to stop blinking.
f) Congrats, you have flashed your BIOS up to version 2104!
g) Download the LATEST BIOS version (currently 4608).
h) Unzip the contents of the 4608 zip file.
i) Rename the file "P9X79-PRO-ASUS-4608.CAP" to "P9X79PRO.CAP"
j) Put the file (AND ONLY THE FILE) on a FAT16 or FAT32 USB Drive (NOTE: 8GB Maximum USB Drive).
k) Insert USB Drive into Flashback slot, hold BIOS FLASHBACK button for 3 seconds, and wait for the lights to stop blinking.
l) Congrats, you have flashed your BIOS up to version 4608! (or the lastest version at the time your reading this).

2) If your BIOS is NEWER than 2104, then perform steps g through l.

That's all there is, its as easy as that. Hope this helps the beginners out there, and minimizes some of the frustration with flashing your BIOS the first time to get the newer processors to function properly with your board.
 
Kickakangroo hasn't answered if it worked.

Thanks for instructions and I hope they will work as I just bought the same motherboard and I was looking for CPU's options.

So, the BIOS firmware will be updated on the board without the help of CPU inside? How does this work, which component processes this info inside the motherboard?

 


I assume you can do this to go backwards yes its just im trying to go back to 3501 because 4801 is a bit of a problem possibly...