743844-015.pdf - 第71页

VCCIN Aux IMON CPU strap will be enabled by default for best performance and power . Processor Graphics Power Management Memory Power Savings Technologies Intel ® Rapid Memory Power Management (Intel ® RMPM) Intel ® Rapi…

Processor deeper Package C-State entry frequency is controlled to minimize platform

energy. When Package C-State Auto-Demotion enabled, a reduced residency in a

deeper Package C-State is expected during system runs with high wake rates.

No change at IDLE scenario power consumption due to this feature. Package C-State

Auto-Demotion is enabled by default and controlled through BIOS menu.

Modern Standby

Modern Standby is a platform state. On display time out the OS requests the

processor to enter package C10 and platform devices at RTD3 (or disabled) in order to

attain low power in idle. Modern Standby requires proper BIOS and OS configuration.

Dynamic LLC Sizing

When all processor IA cores request C8 or deeper C-state, internal heuristics

dynamically flushes the LLC. Once the processor IA cores enter a deep C-state,

depending on their MWAIT sub-state request, the LLC is either gradually flushed N-

ways at a time or flushed all at once. Upon the processor IA cores exiting to C0 state,

the LLC is gradually expanded based on internal heuristics.

Package C-States and Display Resolutions

The integrated graphics engine has the frame buffer located in system memory. When

the display is updated, the graphics engine fetches display data from system memory.

Different screen resolutions and refresh rates have different memory latency

requirements. These requirements may limit the deepest Package C-state the

processor can enter. Other elements that may affect the deepest Package C-state

available are the following:

• Display is on or off

• Single or multiple displays

• Native or non-native resolution

• Panel Self Refresh (PSR) technology

NOTE

Display resolution is not the only factor influencing the deepest Package C-state the

processor can get into. Device latencies, interrupt response latencies, and core C-

states are among other factors that influence the final package C-state the processor

can enter.

Processor AUX Power Management

VCCIN AUX IMON Feature

This feature is the new power feature which allows the processor to read VCCIN Aux

average current via the IMVP9.1 controller over SVID.

It allows the processor to get an accurate power estimation of VCCIN Aux, which is

reflected in more accurate package power reporting and better accuracy in meeting

the package power limits (PL1, PL2, and PL3).

3.2.6

3.3

Intel

Core

™

, Xeon

™

6300 And Xeon

™

E 2400 Processors—Power Management

Generation Intel

Core

™

, Intel

Core

™

Generation, Intel

Core

™

Processor (Series 1) and (Series 2), Intel

Xeon

™

2400 Processor and Intel

Xeon

™

6300 Processor

Datasheet, Volume 1 of 2 May 2025

70 Doc. No.: 743844, Rev.: 015

VCCIN Aux IMON CPU strap will be enabled by default for best performance and

power.

Processor Graphics Power Management

Memory Power Savings Technologies

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 deeper 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.

Display Power Savings Technologies

Intel

Seamless Display Refresh Rate Switching Technology (Intel

SDRRS

Technology) with eDP* Port

Intel

DRRS provides a mechanism where the monitor is placed in a slower refresh

rate (the rate at which the display is updated). The system is smart enough to know

that the user is not displaying either 3D or media like a movie where specific refresh

rates are required. The technology is very useful in an environment such as a plane

where the user is in battery mode doing E-mail, or other standard office applications.

It is also useful where the user may be viewing web pages or social media sites while

in battery mode.

Intel

OLED Power Saving Technology (Intel

OPST) 1.1

Intel

OPST solution uses same HW infrastructure as Intel

DPST. Frames are

processed using frame change threshold based interrupt mechanism similar to Intel

DPST. Intel

OPST SW algorithm determines which pixels in the frame should be

dimmed to save power keeping visual quality (such as contrast, color) impact to

acceptable level. Since there is no backlight for OLED panels, the power savings come

solely from pixel dimming.

Intel

Display Power Saving Technology (Intel

DPST)

The Intel

DPST technique achieves back-light power savings while maintaining a

good visual experience. This is accomplished by adaptively enhancing the displayed

image while decreasing the back-light brightness simultaneously. The goal of this

technique is to provide equivalent end-user-perceived image quality at a decreased

back-light power level.

1. The original (input) image produced by the operating system or application is

analyzed by the Intel

DPST subsystem. An interrupt to Intel

DPST software is

generated whenever a meaningful change in the image attributes is detected. (A

meaningful change is when the Intel

DPST determines if the brightness of the

displaying images and the image enhancement and back-light control needs to be

altered.)

2. Intel

DPST subsystem applies an image-specific enhancement to increase image

brightness.

3.4

3.4.1

3.4.2

Power Management—Intel

Core

™

, Xeon

™

6300 And Xeon

™

E 2400 Processors

Generation Intel

Core

™

, Intel

Core

™

Generation, Intel

Core

™

Processor (Series 1) and (Series 2), Intel

Xeon

™

2400 Processor and Intel

Xeon

™

6300 Processor

May 2025 Datasheet, Volume 1 of 2

Doc. No.: 743844, Rev.: 015 71

3. A corresponding decrease to the back-light brightness is applied simultaneously to

produce an image with similar user-perceived quality (such as brightness) as the

original image.

Intel

DPST 7.1 has improved power savings without adversely affecting the

performance.

NOTE

Generation Intel

Core

™

processor uses Intel

DPST 7.1 while Intel

Core

™

Generation Processors uses Intel

DPST 8.0

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.

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. LPSP is achieved by keeping a pipe enabled

during eDP* only with minimal display pipeline support.

Low-Power Dual Pipe (LPDP)

This feature is similar to LPSP and is applicable for designs with dual eDP* panels.

Intel

Smart 2D Display Technology (Intel

S2DDT)

Intel

S2DDT reduces display refresh memory traffic by reducing memory reads

required for display refresh. Power consumption is reduced by less accesses to the

IMC. Intel S2DDT is only enabled in single pipe mode.

Intel

S2DDT is most effective with:

• Display images well suited to compression, such as text windows, slide shows, and

so on. Poor examples are 3D games.

• Static screens such as screens with significant portions of the background showing

2D applications, processor benchmarks, and so on, or conditions when the

processor is idle. Poor examples are full-screen 3D games and benchmarks that

flip the display image at or near display refresh rates.

Processor Graphics Core Power Savings Technologies

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

3.4.3

Intel

Core

™

, Xeon

™

6300 And Xeon

™

E 2400 Processors—Power Management

Generation Intel

Core

™

, Intel

Core

™

Generation, Intel

Core

™

Processor (Series 1) and (Series 2), Intel

Xeon

™

2400 Processor and Intel

Xeon

™

6300 Processor

Datasheet, Volume 1 of 2 May 2025

72 Doc. No.: 743844, Rev.: 015