Data Sheet

Power Management
82 Datasheet, Volume 1 of 2
In C7 or deeper power state, the processor internally gates V
CCIO
for all non-critical
state to reduce idle power.
In S3 or C-state transitions, the DDR does not go through training mode and will
restore the previous training information.
4.3.4 Power Training
BIOS MRC performing Power Training steps to reduce DDR I/O power while keeping
reasonable operational margins, still ensuring platform operation. The algorithms
attempt to weaken ODT, driver strength and the related buffers parameters both on the
MC and the DRAM side and find the best possible trade-off between the total I/O power
and the operational margins using advanced mathematical models.
4.4 PCI Express* Power Management
• Active power management support using L1 state.
• All inputs and outputs disabled in L2/L3 Ready state.
Note: Processor PEG-PCIe interface does not support L1 Substates (L1.1,L1.2 and L1.2
Substates)
Note: Processor PEG-PCIe interface does not support Hot-Plug.
Hot Plug like* is only supported at Processor PEG-PCIe using Thunderbolt Device.
* Turning Thunderbolt™ power on and Off electrically RTD3 Like
Note: The PCI Express* and DMI interfaces are present only in 2-Chip platform processors.
An increase in power consumption may be observed when PCI Express* ASPM
capabilities are disabled.
Table 4-9. Package C-States with PCIe* Link States Dependencies
PEG/DMI L-State Description Package C-State
DMI L1 Higher latency, lower power “standby” state PC6-PC10
PEG
L1, L2,
Disabled,
NDA (no
device
attached)
L1- Higher latency, lower power “standby” state
L2 – Auxiliary-powered Link, deep-energy-saving
state.
Disabled - The intent of the Disabled state is to
allow a configured Link to be disabled until directed
or Electrical Idle is exited (i.e., due to a hot removal
and insertion) after entering Disabled.
NDA- no physical device is attached on PEG port
PC6-PC7
PEG
L2, Disabled,
NDA (no
device
attached)
L2 – Auxiliary-powered Link, deep-energy-saving
state.
Disabled - The intent of the Disabled state is to
allow a configured Link to be disabled until directed
or Electrical Idle is exited (i.e., due to a hot removal
and insertion) after entering Disabled.
NDA- no physical device is attached on PEG port
PC8-PC10