BIOS Information
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ASUS Self-Recovering BIOS
ASUS-exclusive BIOS protection technology automatically recovers the system’s BIOS with
a veried backup in the event of an update failure, preventing the need to replace or reinstall
your hardware.
• Ensures safe BIOS updates.
• Requires no additional software.
• Provides automatic update failure detection and recovery.
• Reduces maintenance frequency and costs.
The system will automatically activate ASUS Self-Recovering BIOS after reboot from the
BIOS update failure.
2.1 BIOS Setup program
Use the BIOS Setup program to update the BIOS or congure its parameters. The BIOS
screens include navigation keys and brief online help to guide you in using the BIOS Setup
program.
Entering BIOS Setup at startup
Press <Delete> or <F2> during the Power-On Self Test (POST). If you do not press <Delete>
or <F2>, POST continues with its routines.
Entering BIOS Setup after POST
• Press <Ctrl>+<Alt>+<Del> simultaneously.
• Press the reset button on the system chassis.
• Press the power button to turn the system off then back on. Do this option only if you
failed to enter BIOS Setup using the rst two options.
Using the power button, reset button, or the <Ctrl>+<Alt>+<Del> keys to force reset from a
running operating system can cause damage to your data or system. We recommend you
always shut down the system properly from the operating system.
• The BIOS Setup screens shown in this section are for reference purposes only, and
may not exactly match what you see on your screen.
• Visit the ASUS website at www.asus.com to download the latest BIOS le for this
motherboard.
• If the system becomes unstable after changing any BIOS setting, load the default
settings to ensure system compatibility and stability. Select the Load Optimized
Defaults item under the Exit menu or press hotkey <F5>.
• If the system fails to boot after changing any BIOS setting, try to clear the CMOS and
reset the motherboard to the default value. See section 1.2 Motherboard overview
for information on how to erase the RTC RAM.
ASUS Pro A520M-C II
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