Asus F2A55-M LE - Manual (Page 69)

Chapter 2: BIOS information 2-27
2.7.6 Option ROM Messages [Force BIOS]
[Force BIOS] The third-party ROM messages will be forced to display during the boot
sequence.
[Keep Current] The third-party ROM messages will be displayed only if the third-party
manufacturer had set the add-on device to do so.
2.7.7 Next boot after AC Power Loss [Normal Boot]
[Normal Boot] Returns to normal boot on the next boot after an AC power loss.
[Fast Boot]
Accelerates the boot speed on the next boot after an AC power loss.
2.7.8 CSM Parameters
This option controls whether or not CSM will be launched.
Launch CSM [Auto]
Configuration option: [Auto] [Enabled] [Disabled]
[Enabled] [Disabled]
The following four items appear only when you set Launch CSM to [Enabled].
Boot option filter [UEFI and Legacy]
Configuration option: [UEFI and Legacy] [Legacy only] [UEFI only]
Launch PXE OpROM policy [Legacy first]
Configuration option: [DO NOT launch] [Legacy first] [UEFI first]
Launch Storage OpROM policy [Legacy first]
Configuration option: [DO NOT launch] [Both, Legacy first] [Both, UEFI first] [Legacy
first] [UEFI first]
Other device ROM priority [Legacy first]
Configuration option: [Legacy first] [UEFI first]
[Legacy first] [UEFI first]
2.7.9 Security Boot parameters
This option allows you to configure the Secure Boot related parameters.
OS Type [Other Legacy & UEFI]
Configuration option: [Windows 8 UEFI] [Other Legacy & UEFI]
Secure Boot Mode [Standard]
This item appears only when you set the OS Type to [Windows 8 UEFI]. Configuration
option: [Standard] [Custom]
The following items appear when Secure Boot Mode is set to [Custom].