Intel BX80646I74770 Computer Hardware User Manual


 
Graphics Power Management
Intel
®
Rapid Memory Power Management (Intel
®
RMPM)
Intel Rapid Memory Power Management (Intel RMPM) conditionally places memory
into self-refresh when the processor is in package C3 or deeper power state to allow
the system to remain in the lower power states longer for memory not reserved for
graphics memory. Intel RMPM functionality depends on graphics/display state
(relevant only when processor graphics is being used), as well as memory traffic
patterns generated by other connected I/O devices.
Graphics Render C-State
Render C-state (RC6) is a technique designed to optimize the average power to the
graphics render engine during times of idleness. RC6 is entered when the graphics
render engine, blitter engine, and the video engine have no workload being currently
worked on and no outstanding graphics memory transactions. When the idleness
condition is met, the processor graphics will program the graphics render engine
internal power rail into a low voltage state.
Intel
®
Graphics Dynamic Frequency
Intel Graphics Dynamic Frequency Technology is the ability of the processor and
graphics cores to opportunistically increase frequency and/or voltage above the
guaranteed processor and graphics frequency for the given part. Intel Graphics
Dynamic Frequency Technology 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 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 try to place the
graphics engine in the most energy efficient P-state.
4.6
4.6.1
4.6.2
4.6.3
Processor—Power Management
Desktop 4th Generation Intel
®
Core
Processor Family, Desktop Intel
®
Pentium
®
Processor Family, and Desktop Intel
®
Celeron
®
Processor Family
Datasheet – Volume 1 of 2 December 2013
64 Order No.: 328897-004