Asus Z87-A - Manual (Page 87)

Chapter 2: BIOS information 2-37
2.8 Boot menu
The Boot menu items allow you to change the system boot options.
Boot Configuration
2.8.1
Fast Boot [Enabled]
[Disabled] Allows your system to go back to its normal boot speed.
[Enabled] Allows your system to accelerate the boot speed.
The following items appear only when you set the Fast Boot to [Enabled].
USB Support [Partial In...]
[Disabled] All USB devices will not be available until OS boot up for a fastest
POST time.
[Full Initialization] All USB devices will be available during POST. This process will
extend the POST time.
[Partial
Initialization]
For a faster POST time, only USB ports with keyboard and mouse
connections will be detected.