User Manual

Technical Reference
49
5 Overview of BIOS Features
5.1 Introduction
The board uses an ASUS AMI BIOS core that is stored in the Serial Peripheral Interface Flash
Memory (SPI Flash) and can be updated through multiple methods (see Section 5.2). The SPI Flash
contains the BIOS Setup program, POST, the PCI auto-configuration utility, LAN EEPROM
information, and Plug and Play support. The SPI Flash includes a 32 MB flash memory device.
The BIOS Setup program can be used to view and change the identification information and the
BIOS settings for the system. The BIOS Setup program is accessed by pressing <F2> after the POST
memory test beings and before the operating system boots.
5.2 BIOS Updates
The BIOS can be updated using one of the following methods:
1. Express BIOS (Windows-based) Update
2. F7 Update
3. Power Button Menu Update
4. UEFI Shell Update
More information and instructions on how to use each of these methods can be found at BIOS
Update and Recovery Instructions. All BIOS update files for ASUS NUCs are available on Download
Center.
5.2.1 BIOS Recovery
It is unlikely that anything will interrupt a BIOS update; however, if an interruption occurs the BIOS
could be unstable. Table 20 lists the drives and media types that can be used for BIOS recovery.
The BIOS recovery media does not need to be made bootable. More information about BIOS
recovery methods and instructions can be found at BIOS Update and Recovery Instructions.
Table 20. Acceptable Drives/Media Type for BIOS Recovery
Media Type
(Note)
Can be used for BIOS recovery?
Hard disk drive (connected to SATA or USB)
Yes
USB flash drive
Yes
NVME SSD (M.2 interface)
Yes
NOTE Supported file systems for BIOS recovery: NTFS (sparse, compressed, or encrypted
files are not supported), FAT32, EXT
5.3 Boot Options
In the BIOS Setup program, the user can choose to boot from a hard drive, removeable driver, or
the network. The default setting is for the hard drive to be the first boot device, the removeable
drive second, and the network third.