mITX-SKL-H – User Guide, Rev.1.1
www.kontron.com
// 68
Sub-screen
Function
Second level Sub-screen/Description
Power &
Performance>
(continued)
CPU – Power
Management
Control>
(continued)
CPU VR
Settings>
(continued)
VR Mailbox
Command
Options>
Display VR mailbox command options
1: MPS VR command
2: PS4 Exit VR command
4: MPS VR decay command
Note: Multiple commands can be
selected by entering sum from values
of each command.
Platform PL1
Enable>
Enable/disable perform power limit 1 programming by
activating PL1 value used by processor to limit given
power
Platform PL2
Enable>
Enable/disable perform power limit 2 programming. If
disabled, BIOS programs the default values for platform
power limit 2.
Power Limit 4
Override>
Enable/disable power limit 4 override.
If disabled, BIOS leaves default values for power limit 4
C-State>
Enable/disable CPU power management CPU to enter
C-state when not 100 % utilized
Enhanced
C-State>
Enable/disable C11E
If all cores enter C-state, CPU switches to min. speed.
C-State Auto
Demotion>
Configure C-state auto demotion
C-State
Undemotion>
Configure C-state undemotion
Package C-
State
Demotion>
Enable /disable Package C-state demotion
Package C-
state
Undemotion>
Enable/disable Package C-state undemotion
C-State
Prewake>
Enable/disable C-state prewake
Disable by setting bit 30 of POWER_CTL MSR (0X1FC) to 1
IO MWait
Redirection>
If set, maps IO read instructions sent to IO registers
PMG_IO_BASE_Aoff set to MWAIT(offset)
Package C-
state Limit>
Select the maximum package C-state limit setting
C3
Latency
Control
(MSR 0x60A)>
C6/C7 Short
Latency
Control (MSR
0X60B)>
C6/C7 Long
Latency
Control
(MSR 0X60C)>
Setting of time unit (Unit of measurement for IRTL value)
and latency
Setting of time unit (Unit of measurement for IRTL value)
and latency
