X99 How to set the traditional startup?

Your system doesn't have a local boot device, so go directly to the network boot mode. In addition, you may have turned on the quick boot mode in the BIOS, so the screen no longer prompts you to press the Delete key to enter the BIOS. In this case, you can still enter the BIOS. The method is to turn it off and then on, and hold down the Delete key at the same time. At this time, there will be a keyboard error, and the system will terminate the startup and give you a hint. After entering the BIOS, press F9 to restore the default settings. (The shortcut key to enter the BIOS, what key or key was pressed in front, not necessarily the Delete key)