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    INTEL GUIDE FOR LGA1700 / LGA1851PDF · pages 11–12Pages 11–12

    Clocks, Limits and Protection

    4.1 Clock Speeds, Turbo Boost and Power Saving

    PDF · 11Page 11

    In my example, ratios are not fixed manually. This preserves dynamic operation, but Auto with ASUS Advanced OC Profile, ABT, and manual limits cannot be described as a fully stock Intel configuration. Here, boost means an automatic frequency increase; all-core means a load on all cores.

    Clock Speeds, Turbo Boost and Power Saving
    BIOS settingValuePractical meaning
    Performance Core RatioAutoNo manual P-core ratios; the upper bins are determined by the CPU and the active BIOS policy.
    Efficient Core RatioAutoNo manually assigned E-core ratios.
    Min. / Max. CPU Cache RatioAuto / AutoRing/Cache operates dynamically, rather than continuously at its maximum x50.
    Ring Down BinEnabledAllows Ring to downclock under the relevant conditions.
    Intel Adaptive Boost TechnologyEnabledAdditional multithreaded boost when headroom is available. This is not the same as the two-core maximum of x62.
    Turbo Boost Max Technology 3.0EnabledUses preferred P-cores for high clock speeds with a small number of threads.
    TVB Voltage OptimizationsEnabledTemperature-dependent optimization of the voltage request; not a manual ratio.
    Enhanced TVBEnabledThe temperature conditions for boost remain active.
    Overclocking TVBAutoNo separate manual TVB table in this profile.
    AVX2 / Ratio Offset / GuardbandEnabled / Auto / AutoAVX2 is enabled; the ratio reduction (Ratio Offset) and voltage margin (Guardband) were not changed manually.
    SpeedStep / Speed ShiftEnabled / EnabledDynamic control of operating states is retained.
    Enhanced C-states / CPU C-statesEnabled / AutoC1E locked Enabled on the author's Apex Encore / BIOS 2202 / Advanced OC Profile; CPU C-states is separate (9.3).
    Hyper-ThreadingDisabledThis is how my CPU is configured: 24 threads. The method does not require disabling HT.

    If an error occurs only at high boost on one or two P-cores, first separate that operating mode from all-core operation. Limiting ratios and adjusting V/F are separate actions; do not mask the problem by changing DC or disable ABT as a universal way to eliminate x62.

    DOCUMENTATION CONSULTED: ASUS BIOS guides and information; Intel specifications and explanations. ASUS ROG Z790 BIOS Manual, Intel Turbo Technologies, Intel Core i9-14900KS 11

    4.2 Power, Current, Temperature, and VRM

    PDF · 12Page 12
    Power, Current, Temperature, and VRM
    BIOS settingIn my profileMeaning
    ASUS MultiCore EnhancementDisabled - Enforce All limitsEnforces the specified limits. Manually setting 320 W still does not make them Intel Defaults.
    Long / Short Duration Package Power Limit320 / 320 WPL1/PL2 limit power; a limit does not specify required power consumption.
    Package Power Time Window56 sA power-averaging parameter. With equal PL1/PL2, there is no specified transition from 320 → 253 W after 56 seconds.
    CPU Core/Cache Current Limit Max.400 ACPU ICCMAX; not equivalent to the slowly polled IOUT Maximum.
    Unlimited ICCMAXDisabledThe specified ICCMAX current limit remains active.
    Dual Tau BoostDisabledThe separate Tau policy is not used in this example; this does not disable the current limit.
    IA CEP / SA CEPEnabled / EnabledProtections for the respective domains are retained.
    Maximum CPU Core Temperature / Thermal Monitor100 °C / Enabled100 °C is the ceiling in this example, not a target temperature for daily operation.
    CPU Current Reporting100%Do not distort reported current to bypass power control.
    Switch MicrocodeCurrent MicrocodeUses the current BIOS microcode branch, not an older version to bypass restrictions.

    POWER CONFIGURATIONS IN THE INTEL DATASHEET

    Power, Current, Temperature, and VRM
    ProcessorsDatasheet configurationPL1 / PL2TauICCMAX
    13600K/KF, 14600K/KFStandard, 125-W SKU125 / 181 W56 s200 A
    13700K/KF, 14700K/KFStandard, 125-W SKU125 / 253 W56 s307 A
    13900K/KF, 14900K/KFStandard, 125-W SKU125 / 253 W56 s307 A
    13900K/KF, 14900K/KFExtreme Config253 / 253 W56 s400 A
    13900KS, 14900KSStandard, 150-W SKU253 / 253 W56 s307 A
    13900KS, 14900KSExtreme Config320 / 320 W56 s400 A

    These are datasheet power configurations; the full Intel Default Settings BIOS profile includes other parameters. SKU identifies a specific CPU model. My example uses the 14900KS Extreme configuration, but lower limits may suit the cooling and workload. For another SKU, use its documented limits.

    Secondary settings for my VRM

    Power, Current, Temperature, and VRM
    SettingValueRole in the method
    CPU Current Capability100%An external VRM setting, not a replacement for CPU ICCMAX
    Switching Frequency / Duty / Phase500 kHz / Extreme / OptimizedSettings from the example, not required improvements for AC undervolting
    CPU Power Thermal Control125 °CA VRM protection threshold, not an operating temperature target
    CPU Input Voltage LLCLevel 2A separate CPU Input rail; not CPU VCCCORE LLC. It is not tuned for IA AC LL
    DOCUMENTATION CONSULTED: Intel specifications and explanations; ASUS BIOS guides and information. Intel Datasheet, Intel VCCCORE, ASUS ROG Z790 BIOS Manual, Intel Vmin Update 12