ASROCK N68-GS4 FX User Manual page 40

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 0 4 0 4 0 4 0 4 0