Specification Sheet

Power Management
78 Datasheet, Volume 1 of 2
2. Intel DPST subsystem applies an image-specific enhancement to increase image
contrast, brightness, and other attributes.
3. A corresponding decrease to the backlight brightness is applied simultaneously to
produce an image with similar user-perceived quality (such as brightness) as the
original image.
Intel DPST 6.0 has improved the software algorithms and has minor hardware changes
to better handle backlight phase-in and ensures the documented and validated method
to interrupt hardware phase-in.
4.6.2.5 Panel Self-Refresh 2 (PSR 2)
Panel Self-Refresh feature allows the Processor Graphics core to enter low-power state
when the frame buffer content is not changing constantly. This feature is available on
panels capable of supporting Panel Self-Refresh. Apart from being able to support, the
eDP* panel should be eDP 1.4 compliant. PSR 2 adds partial frame updates and
requires an eDP 1.4 compliant panel.
PSR2 is limited to 3200x2000@60 Maximum display resolution.
4.6.2.6 Low-Power Single Pipe (LPSP)
Low-power single pipe is a power conservation feature that helps save power by
keeping the inactive pipes powered OFF. This feature is enabled only in a single display
configuration without any scaling functionalities. This feature is supported from 4th
Generation Intel
®
Core™ processor family onwards. LPSP is achieved by keeping a
single pipe enabled during eDP* only with minimal display pipeline support. This
feature is panel independent and works with any eDP panel (port A) in single display
mode.
4.6.3 Processor Graphics Core Power Savings Technologies
4.6.3.1 Intel
®
Graphics Dynamic Frequency
Intel Turbo Boost Technology 2.0 is the ability of the processor IA cores and graphics
(Graphics Dynamic Frequency) cores to opportunistically increase frequency and/or
voltage above the guaranteed processor and graphics frequency for the given part.
Intel Graphics Dynamic Frequency is a performance feature that makes use of unused
package power and thermals to increase application performance. The increase in
frequency is determined by how much power and thermal budget is available in the
package, and the application demand for additional processor or graphics performance.
The processor IA core control is maintained by an embedded controller. The graphics
driver dynamically adjusts between P-States to maintain optimal performance, power,
and thermals. The graphics driver will always place the graphics engine in its lowest
possible P-State. Intel Graphics Dynamic Frequency requires BIOS support. Additional
power and thermal budget should be available.
4.6.3.2 Intel
®
Graphics Render Standby Technology (Intel
®
GRST)
The final power savings technology from Intel happens while the system is asleep. This
is another technology where the voltage is adjusted down. For RC6, the voltage is
adjusted very low, or very close to zero, what may reduced power by over 1000.