Asus P8B WS - Manual (Page 88)

3-12 Chapter 3: BIOS setup
VCCSA Voltage [Auto]
Allows you to set the VCCSA voltage. The values range from 0.77V to 1.60V with a
0.01V interval.
CPU PLL Voltage [Auto]
Allows you to set the CPU PLL voltage. The values range from 1.20V to 2.20V with
a 0.01V interval.
Load-Line Calibration [Auto]
Load-line is defined by Intel VRM spec and affects CPU voltage. The CPU working
voltage will decrease proportionally to CPU loading. Higher load-line calibration
would get higher voltage and better overclocking performance, but increase the
CPU and VRM thermal. Configuration options: [Auto] [Disabled] [Enabled]
The actual performance boost may vary depending on your CPU specification.
CPU Spread Spectrum [Auto]
[Auto] Automatic configuration.
[Disabled] Enhances the BCLK overclocking ability.
[Enabled] Sets to [Enabled] for EMI control.