Chapter 6: BIOS
59
CPU C State Control
Autonomous Core C-State
Select Enable to support Autonomous Core C-State control which will allow the proces-
sor core to control its C-State setting automatically and independently. The options are
Enable and
Disable
.
CPU C6 Report
Select Enable to allow the BIOS to report the CPU C6 state (ACPI C3) to the operating
system. During the CPU C6 state, power to all caches is turned off. The options are
Auto
, Enable, and Disable.
Enhanced Halt State (C1E)
Select Enable to enable "Enhanced Halt State" support, which will significantly reduce the
CPU's power consumption by minimizing CPU's clock cycles and reduce voltage during
a "Halt State." The options are Disable and
Enable
.
Package C State Control
Package C State
Use this feature to set the limit on the C-State package register. The options are C0/1
state, C2 state, C6 (non-Retention) state, C6 (Retention) state, No Limit, and
Auto
.
Chipset Configuration
Warning:
Setting the wrong values in the following features may cause the system to
malfunction.
North Bridge
This feature allows the user to configure the settings for the Intel North Bridge.
Memory Configuration
Integrated Memory Controller (iMC)
Enforce POR
Select POR to enforce POR restrictions for DDR4 memory frequency and voltage pro-
gramming. The options are
Auto
, POR and Disable.
Memory Frequency
Use this feature to set the maximum memory frequency for onboard memory modules.
The options are
Auto
,
1000, 1200, 1333, 1400, 1600, 1800,1866. 2000, and 2133.
