MSI Z87 User Guide - Page 76
Selects a PLL Phase Lock Loop mode for CPU PCIe. This item appears when
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▶ CPU Base Clock Apply Mode [Auto] Sets the applying mode for adjusted CPU base clock. [Auto] This setting will be configured automatically by BIOS. [Next Boot] CPU will run the adjusted CPU base clock after reboot. [Immediate] CPU runs the adjusted CPU base clock immediately. ▶ CPU PCIE PLL [Auto] (Z87-G43) Selects a PLL (Phase Lock Loop) mode for CPU PCIe. This item appears when the installed CPU supports this setting. [Auto] This setting will be configured automatically by BIOS. [LC PLL] Enables LC PLL for normal usage. [SB PLL] Enables SB PLL for extreme overclocking. ▶ Filter PLL [Auto] (Z87-G43) Enables or disables the filter PLL for CPU. This item appears when the installed CPU supports this setting. [Auto] This setting will be configured automatically by BIOS. [Enabled] Provides wide range of base clock for overclocking when base clock strap be set to higher value. [Disabled] Provides normal range of base clock. ▶ CPU Ratio Mode [Auto] Selects the CPU Ratio operating mode. [Auto] This setting will be configured automatically by BIOS. [Fixed Mode] Fixes the CPU ratio. [Dynamic Mode] CPU ratio will be changed dynamically according to the CPU loading. ▶ Adjust CPU Ratio [Auto] Sets the CPU ratio that is used to determine CPU clock speed. This item can only be changed if the processor supports this function. ▶ Adjusted CPU Frequency Shows the adjusted CPU frequency. Read-only. ▶ EIST [Enabled] Enables or disables the Enhanced Intel® SpeedStep Technology. [Enabled] Enables the EIST to adjust CPU voltage and core frequency dynamically. It can decrease average power consumption and average heat production. [Disabled] Disables EIST. ▶ Intel Turbo Boost [Enabled] Enables or disables the Intel® Turbo Boost. This item appears when the installed CPU supports this function. [Enabled] Enables this function to boost CPU performance automatically above rated specifications when system request the highest performance state. [Disabled] Disables this function. Chapter 3 BOIS Setup 3-18