Download and extract BIOS CAP files from the
official ASUS website at www.asus.com
*Check the below table to confirm your current BIOS version is either .ROM or .CAP. If your BIOS version is .ROM, to update it to the latest .CAP version, go to BIOS Utilities in the download section of the official ASUS product site and use the BIOS Converter for .CAP support first. Detailed installation guides provided.

Example:

BIOS

BIOS-Utilities

*If your BIOS version is 1404 or older: Go to BIOS-Utilities to download and install the BIOS Converter utility before updating the BIOS.

Model lists	P9X79 DELUXE P9X79 PRO P9X79 SABERTOOTH X79	Rampage IV Extreme Rampage IV Extreme/BATTLEFIELD 3 Rampage IV Formula Rampage IV Formula/BATTLEFIELD 3 Rampage IV GENE	P9X79 WS
.ROM BIOS support	BIOS version 1203 or previous version	BIOS version 1404 or previous version	BIOS version 1305 or previous version
.CAP BIOS support	BIOS version 2002 or later version	BIOS version 2003 or later version	BIOS version 3003 or later version

Rename the file as below table, and then save it to the USB storage device’s root directory.

If you are still using .ROM BIOS versions, check the ASUS website for the .ROM to .CAP BIOS Converter, which comes with a detailed user guide.

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.

Connect to a power supply

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

Check this video guide

Note:

1. Do not unplug the portable storage device, power the system down, or press the CLR_CMOS button while BIOS updating is ongoing, or the update will be interrupted. In case of interruption, follow the recommended procedures again to complete the BIOS update.
2. If the light flashes for five seconds and turns stable, USB BIOS Flashback is not operating properly. This may be caused by improper installation of the portable storage device, an error in the file name, or incompatibility in file formats. If this is the case, restart the system until the light clears, and check the file name and format.
3. BIOS updates may affect a PC in various ways. Should any issues with the BIOS arise as a result or your system is unable to boot, please contact your local ASUS support center for further assistance.

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