Data Sheet

Datasheet, Volume 1 of 2 85
Power Management
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.
4.6.3.3 Dynamic FPS (DFPS)
Dynamic FPS (DFPS) or dynamic frame-rate control is a runtime feature for improving
power-efficiency for 3D workloads. Its purpose is to limit the frame-rate of full screen
3D applications without compromising on user experience. By limiting the frame rate,
the load on the graphics engine is reduced, giving an opportunity to run the Processor
Graphics at lower speeds, resulting in power savings. This feature works in both AC/DC
modes.
4.7 System Agent Enhanced Intel
®
Speedstep
®
Technology
System Agent Enhanced Intel
®
Speedstep
®
Technology, a new feature for this
processor, is dynamic voltage frequency scaling of the System Agent clock based on
memory utilization. Unlike processor core and package Enhanced Intel
®
Speedstep
®
Technology, System Agent Enhanced Intel
®
Speedstep
®
Technology has only two valid
operating points.
When workload is low and SA Enhanced Speedstep
®
Technology is enabled, the DDR
data rate may drop temporally as follows:
LPDDR3 – 1066 MT/s
DDR4 – 1333 MT/s
Before changing the DDR data rate, the processor sets DDR to self-refresh and changes
needed parameters. The DDR voltage remains stable and unchanged.
BIOS/MRC DDR training at high and low frequencies sets I/O and timing parameters.
Note: The H/S-Processor Lines do not support System Agent Enhanced Intel
®
Speedstep
®
Technology