How do I enter the BIOS setup program?
To enter BIOS Setup at startup, press <Delete> or <F2> during the Power-On Self Test (POST). To enter BIOS Setup after POST, you can press <Ctrl>+<Alt>+<Delete> simultaneously, press the reset button on the chassis, or press the power button to turn the system off and back on. After any of these options, press the <Delete> key to enter BIOS. (Page 3-2)
From the official ASUS Rog Strix B450 F Gaming Motherboard User manual, page 52
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