Gigabyte GA-P55A-UD7 User Manual page 48

>>> MCH/ICH
PCH Core
The default is Auto.
CPU PLL
The default is Auto.
>>> DRAM
DRAM Voltage
The default is Auto.
DRAM Termination
The default is Auto.
Ch-A Data VRef.
The default is Auto.
Ch-B Data VRef.
The default is Auto.
Ch-A Address VRef.
The default is Auto.
Ch-B Address VRef.
The default is Auto.
BIOS Setup - 48 -