COMeT10-3900/BIOS Settings
v1.1
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4.3.2 Chipset Configuration
Set configuration options that are not CPU-specific.
DTS
Two on-die digital thermal sensors can be read
via an internal register of the processor. The
DTS is the preferred method of reading the
processor die temperature because they are
located much closer to the hottest portions of
the die.
Enable,
Disable
Disable
CPU Power
Management
Provides settings related to CPU power management such as Intel SpeedStep,
Turbo Mode, and C-States.
• EIST
Enhanced Intel SpeedStep allows the CPU to
save power by dynamically changing the
processor clock frequencies. It calculates the
exact frequency needed at any moment by
raising or lowering the clock multiplier and also
adjusts the CPU voltage.
Enable,
Disable
Enable
• Turbo Mode
Raises the clock frequency of processor to a
manufacturer-defined turbo speed. System
load, active cores, estimated current, power
consumption, and core temperature are taken
into account in the boosting process.
Enable,
Disable
Enable
• Boot Perfor-
mance Mode
Selects the performance state that the BIOS
sets before OS handoff.
Max
Performance,
Max Battery
Max
Performance
• C-States
C-States are the “states” the processor comes to
in order to lower power consumption and
temperature.
Enable,
Disable
Enable
• Enhanced
C-States
The C1 state is when the CPU is idle, but is able
to instantly revert to its working state. C1E (C1
Enhanced) is the updated modern version of
the same state.
Enable,
Disable
Enable
• Max Package
C-State
Controls the Max Package C State that the
processor supports.
PC2, PC1, C0 PC2
• Max Core
C-State
Limits the depth of the C-States in the HALT
state.
Fused Value,
Core C10,
Core C9, Core
C8, Core C7,
Core C6, Core
C1, Unlimited
Fused Value
Feature
Description
Choices
Default
Feature
Description
Choices
Default
Max Tolud
Sets the maximum Top of Low Usable DRAM
(TOLUD) value, which specifies the memory space
to be used by internal graphics devices, GTT Stolen
Memory, and TSEG, respectively, if these devices
are enabled.
2 GB,
2.25 GB,
2.5 GB,
2.75 GB, 3 GB
2 GB
Above 4GB
Decoding
Enables/disables memory mapped I/O for a 64-bit
PCIe device to 4 GB or greater address space.
Enable,
Disable
Disable
8254 Clock
Gating
Enables/disables the legacy 8254 timer and saves
power. Some operating systems do not boot if this
is enabled.
Enable,
Disable
Disable
Serial IRQ
Enables/disables SERIRQ. Serialized interrupts are
transmitted over a single shared SERIRQ line. From
a software/OS standpoint, these interrupts are no
different than legacy ISA interrupts.
Enable,
Disable
Enable
