ASROCK N68C-GS4 FX User Manual page 41

TWR
Use this to adjust TWR values. The default value is [Auto].
TRFC
Use this to adjust TRFC values. The default value is [Auto].
TRRD
Use this to adjust TRRD values. The default value is [Auto].
TWTR
Use this to adjust TWTR values. The default value is [Auto].
TRTP
Use this to adjust TRTP values. The default value is [Auto].
TFAW
Use this to adjust TFAW values. The default value is [Auto].
Chipset Settings
Chipset Voltage
Use this to select chipset 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.
4 1 4 1 4 1 4 1 4 1