Seamless Display Refresh Rate Switching Technology (Sdrrst); Thermal Power Management - Intel 2ND GENERATION CORE PROCESSOR FAMILY MOBILE - DATASHEET VOLUME 1 01-2011 Datasheet

Power Management
4.6.8 Seamless Display Refresh Rate Switching Technology
(SDRRST)
This is a mobile only supported power management feature.
When a Local Flat Panel (LFP) supports multiple refresh rates, the Intel
Refresh Rate Switching power conservation feature can be enabled. The higher refresh
rate will be used when on plugged in power or when the end user has not
selected/enabled this feature. The graphics software will automatically switch to a
lower refresh rate for maximum battery life when the notebook is on battery power and
when the user has selected/enabled this feature.
There are two distinct implementations of Intel
®
Intel DRRS method uses a mode change to assign the new refresh rate. The seamless
®
Intel DRRS method is able to accomplish the refresh rate assignment without a mode
change and therefore does not experience some of the visual artifacts associated with
the mode change (SetMode) method.
4.7

Thermal Power Management

See Section 4.6
Datasheet, Volume 1
for all graphics thermal power management-related features.
®
DRRS—static and seamless. The static
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®
Display
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