ASROCK 990FX Extreme4 User Manual page 54

NB Voltage
Use this to select NB Voltage. The default value is [Auto].
HT Voltage
Use this to select HT Voltage. The default value is [Auto].
CPU Load-line calibration
Use this to select CPU Load-line calibration. The default value is [Auto].
CPU VDDA Voltage
Use this to select CPU VDDA Voltage. The default value is [Auto].
PCIE VDDA Voltage
Use this to select PCIE VDDA Voltage. The default value is [Auto].
Would you like to save current setting user defaults?
In this option, you are allowed to load and save three user defaults
according to your own requirements.
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