AXIOMTEK IMB523R User Manual page 44

IMB523R / 524R / 525R LGA1151 ATX Motherboard
Turbo Mode
Enable/Disable processor Turbo Mode (requires EMTTM enabled too). AUTO means
enabled, unless max turbo ratio is bigger than 16 - SKL A0 W/A.
C states
Enable/Disable CPU Power Management, which allows CPU to go to power saving
C-states when it's not 100% utilized.
 Compatibility Support Module (CSM) Configuration
This screen displays CSM information.
CSM Support
Enabled / Disable CSM Support.
GateA20 Active
UPON REQUEST - GA20 can be disabled using BIOS services. ALWAYS - do not allow
disabling GA20. This option is useful when any RT code is executed above 1MB.
Option ROM Messages
Set display mode for Option ROM.
INT19 Trap Response
BIOS reaction on INT19 trapping by Option ROM: IMMEDIATE - execute the trap right
away; POSTPONED - execute the trap during legacy boot.
Boot option filter
This option controls Legacy/UEFI ROMs priority.
Storage
Controls the execution of UEFI and Legacy Storage OpROM.
38 AMI BIOS Setup Utility