MSI Z270I Quick Start Manual page 40

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Extreme Memory Profile (X.M.P.) [Disabled]
X.M.P. (Extreme Memory Profile) is the overclocking technology by memory module.
Please enable XMP or select a profile of memory module for overclocking the memory.
This item will be available when the memory modules that support X.M.P. is installed.
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DRAM Reference Clock [Auto]*
Sets the DRAM reference clock. The valid value range depends on the installed CPU.
This item appears when a CPU that supports this adjustment is installed.
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DRAM Frequency [Auto]
Sets the DRAM frequency. Please note the overclocking behavior is not guaranteed.
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Adjusted DRAM Frequency
Shows the adjusted DRAM frequency. Read-only.
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Memory Try It ! [Disabled]
It improve memory compatibility or performance by choosing optimized memory
preset.
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Advanced DRAM Configuration
Press Enter to enter the sub-menu. User can set the memory timing for each/ all
memory channel. The system may become un-stable or un-bootable after changing
memory timing. If it occurs, please clear the CMOS data and restore the default
settings. (Refer to the Clear CMOS jumper/ button section to clear the CMOS data, and
enter the BIOS to load the default settings.)
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Memory Fast Boot [Auto]*
Enables or disables the initiation and training for memory every booting.
[Auto] The setting will be configured automatically by BIOS.
[Enabled] System will completely keep the archives of first intiation and training
for memory. So the memory will not be initialed and trained when
booting to accelerate the system booting time.
[Disabled] The memory will be initialed and trained every booting.
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CPU Voltages control [Auto]
These options allows you to set the voltages related to CPU. If set to Auto, BIOS will
set these voltages automatically or you can set it manually.
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DRAM Voltages control [Auto]
These options allows you to set the voltages related to memory. If set to Auto, BIOS
will set these voltages automatically or you can set it manually.
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PCH Voltages control [Auto] (optional)
These options allows you to set the voltages related to PCH. If set to Auto, BIOS will
set these voltages automatically or you can set it manually.
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OC Quick View Timer [3 Sec]*
Sets the duration of OC setting values showed on the screen.
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BIOS Setup