ASUS UEFI BIOS

Updating BIOS

The ASUS website publishes the latest BIOS versions to provide enhancements on system stability, compatibility,and performance. However, BIOS updating is potentially risky. If there is no problem using the current version of BIOS, DO NOT manually update the BIOS. Inappropriate BIOS updating may result to system’s failure to boot. Carefully follow the instructions in this chapter to update your BIOS when necessary.

Remarks

Visit http://www.asus.com to download the latest BIOS file for this motherboard. The following utilities allow you to manage and update the motherboard BIOS setup program.

1. EZ Update: Updates the BIOS in Windows® environment.
2. ASUS EZ Flash 3: Updates the BIOS using a USB flash drive.
3. ASUS CrashFree BIOS 3: Restores the BIOS using the motherboard support DVD or a USB flash drive when the BIOS file fails or gets corrupted.

   EZ Update

   The EZ Update is a utility that allows you to update the motherboard BIOS in Windows® environment.

   Remarks

   EZ Update requires an Internet connection either through a network or an ISP (Internet Service Provider). This utility is available in the support DVD that comes with the motherboard package.

ASUS EZ Flash 3

ASUS EZ Flash 3 allows you to download and update to the latest BIOS through the Internet without having to use a bootable floppy disk or an OS-based utility.

Remarks

Updating through the Internet varies per region and Internet conditions. Check your local Internet connection before updating through the Internet.

To update the BIOS by USB:

1. Enter the Advanced Mode of the BIOS setup program. Go to the Tool menu to select ASUS EZ Flash Utility and press Enter.
2. Insert the USB flash disk that contains the latest BIOS file to the USB port.
3. Select by USB.
4. Press Tab to switch to the Drive field.
5. Press the Up/Down arrow keys to find the USB flash disk that contains the latest BIOS, and then press Enter.
6. Press Tab to switch to the Folder Info field.
7. Press the Up/Down arrow keys to find the BIOS file, and then press Enter to perform the BIOS update process. Reboot the system when the update process is done.

Remarks

This function can support devices such as a USB flash disk with FAT 32/16 format and single partition only. • DO NOT shut down or reset the system while updating the BIOS to prevent system boot failure!

Remarks

Ensure to load the BIOS default settings to ensure system compatibility and stability. Select the Load Optimized Defaults item under the Exit menu. See section 1.10 Exit Menu for details.

To update the BIOS by Internet:

1. Enter the Advanced Mode of the BIOS setup program. Go to the Tool menu to select ASUS EZ Flash Utility and press Enter.
2. Select by Internet.
3.  Press the Left/Right arrow keys to select an Internet connection method, and then press Enter.
4. Follow the onscreen instructions to complete the update.
5. Reboot the system when the update process is done.

Remarks

Ensure to load the BIOS default settings to ensure system compatibility and stability. Select the Load Optimized Defaults item under the Exit menu. See section 1.10 Exit Menu for details.

ASUS CrashFree BIOS 3

 The ASUS CrashFree BIOS 3 utility is an auto recovery tool that allows you to restore the BIOS file when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS file using the motherboard support DVD or a USB flash drive that contains the BIOS file.

Remarks

The BIOS file in the motherboard support DVD may be older than the BIOS file published on the ASUS official website. If you want to use the newer BIOS file, download the file at https://www.asus.com/support/ and save it to a USB flash drive.

Recovering the BIOS

 

To recover the BIOS

1. Turn on the system.
2. Insert the motherboard support DVD to the optical drive, or the USB flash drive containing the BIOS file to the USB port.
3. The utility automatically checks the devices for the BIOS file. When found, the utility reads the BIOS file and enters ASUS EZ Flash 3 automatically.
4. The system requires you to enter BIOS Setup to recover the BIOS setting. To ensure system compatibility and stability, we recommend that you press F5 to load default BIOS values.

Remarks

DO NOT shut down or reset the system while updating the BIOS! Doing so can cause system boot failure!

Sources and References

• https://dlcdnets.asus.com/pub/ASUS/mb/LGA1151/STRIX_B250F_GAMING/E12497_STRIX_B250F-GAMING_BIOS_UM_web_only_20170706.pdf
• https://dlcdnets.asus.com/pub/ASUS/mb/LGA1151/ROG_STRIX_Z390-I_GAMING/E14477_ROG_STRIX_Z390-I_GAMING_UM_WEB.pdf