ASUS PRIME X399-A
3-1
Chapter 3
3
The new ASUS UEFI BIOS is a Unified Extensible Interface that complies with UEFI
architecture, offering a user-friendly interface that goes beyond the traditional keyboard-
only BIOS controls to enable a more flexible and convenient mouse input. You can easily
navigate the new UEFI BIOS with the same smoothness as your operating system. The
term “BIOS” in this user manual refers to “UEFI BIOS” unless otherwise specified.
BIOS (Basic Input and Output System) stores system hardware settings such as storage
device configuration, overclocking settings, advanced power management, and boot
device configuration that are needed for system startup in the motherboard CMOS. In
normal circumstances, the default BIOS settings apply to most conditions to ensure
optimal performance.
DO NOT change the default BIOS settings
except in the following
circumstances:
•
An error message appears on the screen during the system bootup and requests you
to run the BIOS Setup.
•
You have installed a new system component that requires further BIOS settings or
update.
Inappropriate BIOS settings may result to instability or boot failure.
We strongly
recommend that you change the BIOS settings only with the help of a trained service
personnel
.
•
When downloading or updating the BIOS file, rename it as
PX399A.CAP
for this
motherboard.
•
BIOS settings and options may vary due to different BIOS release versions. Please
refer to the latest BIOS version for settings and options.
BIOS Setup
3.1
Knowing BIOS
Chapter 3:
BIOS Setup
3
Summary of Contents for Prime X399-A
Page 1: ...Motherboard PRIME X399 A ...
Page 14: ...xiv ...
Page 40: ...1 26 Chapter 1 Product Introduction Chapter 1 ...
Page 46: ...2 6 Chapter 2 Basic Installation Chapter 2 To remove a DIMM 2 1 4 DIMM installation ...
Page 48: ...2 8 Chapter 2 Basic Installation Chapter 2 2 1 6 SATA device connection OR ...
Page 58: ...2 18 Chapter 2 Basic Installation Chapter 2 ...
Page 84: ...3 26 Chapter 3 BIOS Setup Chapter 3 ...