Asus P7H55 Computer Hardware User Manual


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2-14 Chapter 2: BIOS information
2.4.18 CPU PLL Voltage [Auto]
Allows you to set the CPU PLL voltage. The values range from 1.8V to 2.5V with a 0.0125V
interval.
2.4.19 PCH Voltage [Auto]
Allows you to set the Platform Controller Hub voltage. The values range from 1.05V to 1.5V
with a 0.0125V interval.
• The values of the IMC Voltage, DRAM Voltage, CPU PLL Voltage and PCH Voltage
items are labeled in different color, indicating the risk levels of high voltage settings.
Refer to the table on the next page for details.
• The system may need better cooling system to work stably under high voltage settings.
Blue Yellow Purple Red
IMC Voltage
1.10000V–
1.16875V
1.17500V–
1.22500V
1.23125V–
1.30000V
1.30625V–
1.70000V
DRAM Voltage
1.2000V–
1.5625V
1.5750V–1.6250V 1.6375V–1.6875V 1.7000V–2.0000V
CPU PLL Voltage
1.8000V–
1.8625V
1.8750V–
1.9250V
1.9375-
1.9875
2.0000V–
2.5000V
PCH Voltage
1.0500V-
1.1875V
1.2000V
1.3000V
1.3125V
1.4500V
1.4625V-
1.5000V
2.4.20 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.
2.4.21 Load-Line Calibration [Auto]
[Auto] Automatic conguration.
[Disabled] Follow Intel specications.
[Enabled] Improve CPU VDroop directly.
2.4.22 CPU Spread Spectrum [Auto]
[Auto] Automatic conguration.
[Disabled] Enhances the BCLK overclocking ability.
[Enabled] Sets to [Enabled] for EMI control.
2.4.23 PCIE Spread Spectrum [Auto]
[Auto] Automatic conguration.
[Disabled] Enhances the PCIE overclocking ability.
[Enabled] Sets to [Enabled] for EMI control.
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