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Chapter 4: AMI BIOS
PECI Enable
Select Enabled to enable PECI (Platform Environment Control Interface) support,
which will enhance CPU thermal management to achieve power efficiency. The
options are Enable and Disable.
PECI Trusted
Select Enabled to support Trusted Platform Environment Control Interface to im-
prove CPU thermal management. The options are Disable and Enable.
PECI SMBus Speed
Use this feature to set the speed for the physical bus to operate. The options are
Standard (80 kHz), Standard (100 kHz), Fast Mode (400 kHz), and Fast Mode
Plus (1 MHz).
Turbo (Available if Intel EIST technology is Enabled)
This feature allows processor cores to run faster than marked frequency in specific
conditions. The options are Disable and Enable.
RAPL
Select Enabled to enable RAPL (Running Average Power Limit) support. Use the
keyboard to enter your default setting.
MSR 670 PKG_TURBO_CFG1
Use this feature to specify various parameters of system components such as Turbo,
Minimum Energy, SoC TDP Policy, ICMax Control, and Turbo Mode.
MSR 672_TURBO_WKLD_CFG2
Use this feature to specify ICCMax Throttle Ratio for C6 Exits when the value of
PKG_TURBO_CFG1 [4:3] equals to 10Y.
Active Processor Cores
This feature determines how many CPU cores will be activated for each CPU. When
all is selected, all cores in the CPU will be activated. (Please refer to the Intel web
site for more information.) The options are All, 4, and 2.
CPU Flex Ratio Override
Select Enabled to support CPU Flex Ratio Programming. The options are Disable
and Enable.
CPU Core Ratio
Use this feature to set the CPU Core Ratio when CPU Flex Ratio Override is set
to Enabled. Use the keyboard to enter the desired value for the CPU core ratio.
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