Know How: Digi+ Power Control Rampage IV Formula

Published by Marc Büchel on 21.12.11
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CPU Settings



CPU Load Line Calibration Various steps of the CPU Load-Line Calibration (Regular / Medium / High / Ultra / High / Extreme) or Auto, to let the ASUS Tuning Expert Team choose it for you. (Auto is only available under BIOS) Careful adjustment of such option can help to prevent Vdrop of the CPU Vcore, when the CPU is under load. Vdrop itself describes the phenomenon that Vcore drops under load.
   
CPU Current Capability Overrides the CPU Vcore over current proctection level to up to 100 % above the original via the CPU Current Capability option, in order to prevent the system from throttling down when the CPU has been overloaded.
   
CPU Voltage Frequency Controls the Vcore Switching Frequency for the delivery of more stable power to the CPU via the adjustment of CPU Voltage Frequency option. Alternatively, users can also enable the CPU Spread Spectrum option for a lower instantaneous emission of EMI for better system stability. Generally speaking, if CPU Voltage Frequency is not going to be set to "Manual" while with CPU Fixed Frequency set to a higher value, then it is always advised to enable CPU Vcore Spread Spectrum for better stability. CPU Vcore Spread Spectrum is only available when CPU Power Phase Control has not been set Extreme.
   
VRM Over Temperature Protection Disables the overheat protection of the Extreme Engine DIGI+2 power solution via the VRM Over Temperature Protection. Doing so will prevent the CPU from throttling when the Extreme DIGI+ 2 power circuit overheats to ensure better overall performance with the risk of damaging the power solution in the long run.
   
CPU Power Duty Control The availability of CPU Power Duty Control, allowing the CPU VRM to balance the loads applied onto each power phase to correspond to either the temperature or the current draw of each power phase.
   
Vcore MOS volt. Control The Vcore MOS volt. Control option allows the users to control the voltage supplied to the MOSFETs in the CPU power circuitry. Useres can lower it to reduce some power consumption, or raising it for the more efficient delivery of power.
   
CPU Power Phase Control Controls the CPU Power Phase Control to decide if the CPU VRM should reduce the number of active phases (Standard / Optimized / Extreme / Manual Adjust) to allow better power efficiency when the system idles down. Once set to Manual Adjust mode, user can also define how fast the PWM phase should vary with respect to the loading applied on it (Ultra Fast / Fast / Medium / Regular).
   
CPU Spread Spectrum CPU Spread Spectrum option for a lower instantaneous emission of EMI for better system stability. Generally speaking, if CPU Voltage Frequency is not going to be set to "Manual" while with CPU Fixed Frequency set to a higher value, then it is always advised to enable CPU Vcore Spread Spectrum for better stability. CPU Vcore Spread Spectrum is only available when CPU Power Phase Control has not been set Extreme.
   
CPU VCORE Boot Up Voltage Overrides the default CPU Vcore before the user input CPU Vcore value was set during the POST sequence via the CPU VCORE Boot Up Voltage. Careful adjustment of this option may bring better OC margin for the CPU.
   
VCCSA Load-Line Calibration Various setps of the VCCSA Load-Line Calibration (Regular / High / Extreme) or Auto, to let the ASUS Tuning Expert Team choose it for you. (Auto is only available under BIOS) Careful adjustment of such option can help to prevent Vdrop of the VCCSA, which is the power going into the memory controller, when it is under load.
   
VCCSA Current Capability Overrides the VCCSA over current protection level to up to 40 % above the original via the VCCSA Current Capability option, in order to prevent the system from throttling down when the CPU integrated memory controller has been overloaded.
   
VCCSA Fixed Frequency Overrides the switching frequency of the VCCSA power supply via the control of the VCCSA Switching Frequency option. Setting to a higher value may help to stabilize the power delivery to the VCCSA for a higher CPU OC margin.
   
CPU VCCSA Boot Up Voltage Overrides the default VCCSA before the user input VCCSA value was set during the POST sequence via the VCCSA Boot Up Voltage. Careful adjustment of this option may bring better OC margin for the CPU.



Page 1 - Introduction
Page 2 - CPU Settings
Page 3 - VTT and DRAM Settings


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