EVGA P55 FTW - Manual (Page 36)

Figure 4. Advanced BIOS Features
IDE Configuration
Use this to configure your storage drivers and to enable RAID or switch
between IDE and AHCI mode. Please note for Windows Vista / Windows 7, it
is recommended to use AHCI mode for new system installations.
Boot Settings Configuration
Use this option to configure various system options, such as Bootup Num-Lock
status, Quiet Boot and other advanced features.
AHCI Configuration
This menu will allow you to change advanced AHCI settings, such as S.M.A.R.T.
status and more.
:Move Enter:Select +/-/:Value F10:Save ESC:Exit F1:General Help
F5:Previous Values F7:Optimized Defaults
Advanced Settings
______________________________________________
WARNING: Setting wrong values in below sections
may cause system to malfunction.
 IDE Configuration
[Press Enter]
 Boot Settings Configuration [Press Enter]
 AHCI Configuration [Press Enter]
 USB Configuration [Press Enter]
Help Item
Main Level 
Select Removable Boot
Device Priority