Asus P7H55D-M EVO - Manual (Page 82)

3-20 Chapter 3: BIOS setup
Chapter 3
3.5.16 CPU PLL Voltage [Auto]
Allows you to set the CPU PLL voltage. The values range from 1.8V to 2.2V with a 0.02V interval.
3.5.17 PCH Voltage [Auto]
Allows you to set the Platform Controller Hub voltage. The values range from 1.05V to 2.0V
with a 0.01V interval.
The system may need better cooling system to work stably under high voltage settings.
3.5.18 iGPU Voltage [Auto]
Allows you to set the integrated GPU voltage. The values range from 0.5V to 1.75V with a
0.0125V interval.
3.5.19 Load-Line Calibration [Auto]
[Auto] BIOS automatically adjusts the voltage.
[Disabled] Follows the Intel specifications.
[Enabled] Improves the CPU VDroop directly.
3.5.20 CPU Spread Spectrum [Auto]
[Auto] Automatic configuration.
[Disabled] Enhances the BCLK overclocking ability.
[Enabled] Sets to [Enabled] for EMI control.
3.5.21 PCIE Spread Spectrum [Auto]
[Auto] Automatic configuration.
[Disabled] Enhances the PCIE overclocking ability.
[Enabled] Sets to [Enabled] for EMI control.