Data Sheet
Datasheet, Volume 1 of 2 91
Thermal Management
In each mode, the Intel
®
Turbo Boost Technology 2.0 power limits are reprogrammed
along with a new OS controlled frequency range. The DPTF driver assists in all these
operations. The cTDP mode does not change the max per-processor IA core turbo
frequency.
5.1.4.2 Low-Power Mode
Low-Power Mode (LPM) can provide cooler and quieter system operation. By combining
several active power limiting techniques, the processor can consume less power while
running at equivalent low frequencies. Active power is defined as processor power
consumed while a workload is running and does not refer to the power consumed
during idle modes of operation. LPM is only available using the Intel
®
DPTF driver.
Through the DPTF driver, LPM can be configured to use each of the following methods
to reduce active power:
Restricting package power control limits and Intel
®
Turbo Boost Technology availability
Off-Lining processor IA core activity (Move processor traffic to a subset of cores)
Placing a processor IA Core at LFM or LSF (Lowest Supported Frequency) Utilizing IA
clock modulation.
LPM power as listed in the TDP Specifications table is defined at point which processor
IA core working at LSF, GT = RPn and 1 IA core active.
Off-lining processor IA core activity is the ability to dynamically scale a workload to a
limited subset of cores in conjunction with a lower turbo power limit. It is one of the
main vectors available to reduce active power. However, not all processor activity is
ensured to be able to shift to a subset of cores. Shifting a workload to a limited subset
of cores allows other processor IA cores to remain idle and save power. Therefore,
when LPM is enabled, less power is consumed at equivalent frequencies.
Minimum Frequency Mode MFM of operation, which is the lowest supported frequency
(LSF) at the LFM voltage, has been made available for use under LPM for further
reduction in active power beyond LFM capability to enable cooler and quieter modes of
operation.
Table 5-1. Configurable TDP Modes
Mode Description
Base
The average power dissipation and junction temperature operating condition limit,
specified in Table 5-2 and Table 5-5 for the SKU Segment and Configuration, for which
the processor is validated during manufacturing when executing an associated Intel-
specified high-complexity workload at the processor IA core frequency corresponding to
the configuration and SKU.
TDP-Up
The SKU-specific processor IA core frequency where manufacturing confirms logical
functionality within the set of operating condition limits specified for the SKU segment
and Configurable TDP-Up configuration in Table 5-2 and Table 5-5. The Configurable TDP-
Up Frequency and corresponding TDP is higher than the processor IA core Base
Frequency and SKU Segment Base TDP.
TDP-Down
The processor IA core frequency where manufacturing confirms logical functionality
within the set of operating condition limits specified for the SKU segment and
Configurable TDP-Down configuration in Table 5-2 and Table 5-5. The Configurable TDP-
Down Frequency and corresponding TDP is lower than the processor IA core Base
Frequency and SKU Segment Base TDP.