How do I enter the BIOS Setup on the PRIME B660-PLUS D4?

Press the Delete or F2 key during the Power-On Self Test (POST) to enter BIOS Setup at startup. If you miss the POST window, you can also enter BIOS after POST by pressing Ctrl+Alt+Delete simultaneously, pressing the reset button, or turning the system off and back on, then pressing the Delete key. The BIOS Setup program supports two modes: EZ Mode and Advanced Mode, switchable via the F7 hotkey.