Asus ROG STRIX X399-E GAMING [56/100] Bios update utility

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Chapter 2: Basic Installation

Chapter 2

2.2 BIOS update utility

USB BIOS Flashback

USB BIOS Flashback allows you to easily update the BIOS without entering the existing

BIOS or operating system. Simply insert a USB storage device to the USB port (the USB port

hole marked in green on the I/O shield) then press the USB BIOS Flashback button for three

seconds to automatically update the BIOS.

To use USB BIOS Flashback:

1. Insert a USB storage device to the USB Flashback port.

2. Visit https://www.asus.com/support/ and download the latest BIOS version for this

motherboard.

3. Rename the le as RSX399EG.CAP, then copy it to your USB storage device.

4. Shut down your computer.

5. Press the BIOS Flashback button for three seconds until the Flashback LED blinks

three times, indicating that the BIOS Flashback function is enabled.

• Do not unplug portable disk, power system, or press the CLR_CMOS button while

BIOS update is ongoing, otherwise update will be interrupted. In case of interruption,

please follow the steps again.

• If the light ashes for ve seconds and turns into a solid light, this means that

the BIOS Flashback is not operating properly. This may be caused by improper

installation of the USB storage device and lename/le format error. If this scenario

happens, please restart the system to turn off the light.

• Updating BIOS may have risks. If the BIOS program is damaged during the process

and results to the system’s failure to boot up, please contact your local ASUS Service

Center.

For more BIOS update utilities in BIOS setup, refer to the section 3.11 Updating BIOS in

Chapter 3.

USB BIOS Flashback port

BIOS Flashback button

6. Wait until the light goes out, indicating that the BIOS updating process is completed.