Intel D2500 DF8064101055400 Data Sheet
Product codes
DF8064101055400
Datasheet - Volume 1 of 2
103
Figure 7-19.Processor Core Low-Power States
Table 7-58.Coordination of Thread Low-power States at the /Core Level
7.2.4
Graphics Power Management
7.2.4.1
Graphics and video decoder C-State
GFX C-State (GC6) and VED C-State (VC6) are techniques designed to optimize the
average power to the graphics and video decoder engines during times of idleness. GFX
C-state is entered when the graphics engine, has no workload being currently worked
on and no outstanding graphics memory transactions. Using the same concept, VED C-
state is entered when the video decoder engine has no workload being currently
worked on and no outstanding video memory transactions. When the idleness condition
is met, the Processor will power gate the Graphics and video decoder engines.
Processor
Core
C-State
Thread 1
C0
C1
C2
C3
C4
C6
Thread 0
C0
C0
C0
C0
C0
C0
C0
C1
C0
C1
C1
C1
C1
C1
C2
C0
C1
C2
C2
C2
C2
C3
C0
C1
C2
C3
C3
C3
C4
C0
C1
C2
C3
C4
C4
C6
C0
C1
C2
C3
C4
C6
Stop Grant
Snoop
Normal
Stop
Grant
Deep
Sleep
STPCLK# asserted
Snoop
serviced
Snoop
occurs
occurs
Deeper
Sleep
DPSLP# asserted
DPSLP# de-asserted
DPRSTP# de-asserted
DPRSTP# asserted
STPCLK# de-asserted