Asus P8Z77 WS, User Manual

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3-18 Chapter 3: BIOS setup
Chapter 3
According to Intel CPU spec, DIMMs with voltage requirement over 1.65V may damage
the CPU permanently. We recommend you install the DIMMs with the voltage requirement
below 1.65V.
VCCSA Voltage [Auto]
Allows you to set the VCCSA voltage. The values range from 0.80V to 1.70V with a 0.00625V
interval.
VCCIO Voltage [Auto]
Allows you to set the VCCIO voltage. The values range from 0.80V to 1.70V with a 0.00625V
interval.
CPU PLL Voltage [Auto]
Allows you to set the CPU PLL voltage. The values range from 1.20V to 2.20V with a
0.00625V interval.
PCH Voltage [Auto]
Allows you to set the Platform Controller Hub voltage. The values range from 0.8000V to
1.7000 with a 0.01V interval.
• The values of the CPU Manual Voltage, CPU Offset Voltage, iGPU Manual Voltage,
iGPU Offset Voltage, DRAM Voltage, VCCIO Voltage, and PCH Voltage items are
labeled in different color, indicating the risk levels of high voltage settings.
• The system may need better cooling system to work stably under high voltage
settings.
DRAM DATA REF Voltage on CHA/B [Auto]
Allows you to set the DRAM DATA Reference Voltage on Channel A/B. The values
range from 0.395x to 0.630x with a 0.005x interval. Different ratio might enhance DRAM
overclocking ability.
DRAM CTRL REF Voltage on CHA/B [Auto]
Allows you to set the DRAM Control Reference Voltage on Channel A/B. The values
range from 0.395x to 0.630x with a 0.005x interval. Different ratio might enhance DRAM
overclocking ability.
CPU Spread Spectrum [Auto]
[Auto] Automatic configuration.
[Disabled] Enhances the BCLK overclocking ability.
[Enabled] Sets to [Enabled] for EMI control.