Asus RAMPAGE IV BLACK EDITION AC4 RAMPAGE IV BLACK EDITION User's Manual - Page 104

CPU Power Phase Control [Auto] Phase number is the number of working VRM phase. Increasing phase number under heavy system loading to get more transient and better thermal performance. Reducing phase number under light system loading to increase VRM efficiency [Standard] Proceeds phase control depending on the CPU loading. [Optimized] Loads the ASUS optimized phase tuning profile. [Extreme] Proceeds the full phase mode. [Manual Adjustment] Allows manual adjustment. CPU Spread Spectrum [Disabled] Allows you to enable or disable CPU Spread Spectrum that enhances system stability. Configuration Options: [Disabled] [Enabled] Current Inrush Inertia [Auto] When enabled, helps reduce inrush current at the expense of slightly lower voltage under load. Configuration Options: [Auto] [Disabled] [Enabled] CPU VCore Bootup Voltage [Auto] This item controls the voltage for CPU at initial boot. Set to higher value for better overclocking. The values range from 0.800V to 1.700V with a 0.005V interval. CPU VSA VCCSA Load-line calibration [Auto] The behavior of the DRAM controller is decided by VCCSA Load-Line. Set to a higher value for system performance, or to a lower value for better thermal solution. Configuration options: [Auto] [Regular] [High] [Extreme] VCCSA Current Capability [100%] Allows you to set the VCCSA current capability. A higher value brings wider total DRAM controller power range and extends the overclocking frequency range simultaneously. Configuration options: [100%] [110%] [120%] [130%] VCCSA Fixed Frequency [300] The values range from 300kHz to 600kHz with a 50kHz interval. CPU VSA Bootup Voltage [Auto] This item controls the voltage for CPU VSA at initial boot. Set higher value for better overclockability. The values range from 0.800V to 1.990V with a 0.005V interval. Chapter 3 3-14 Chapter 3: BIOS setup