743844-015.pdf - 第50页

— Software-requested transitions are accepted at an y time. If a previous transition is in progress, the new tr ansition is deferred until the previous transition is completed. • The processor controls voltage ramp r ate…

NOTE

Intel

Turbo Boost Technology 2.0 may not be available on all SKUs.

Intel

Turbo Boost Technology 2.0 Frequency

To determine the highest performance frequency amongst active processor IA cores,

the processor takes the following into consideration:

• The number of processor IA cores operating in the C0 state.

• The estimated processor IA core current consumption and ICCMax settings.

• The estimated package prior and present power consumption and turbo power

limits.

• The package temperature.

Any of these factors can affect the maximum frequency for a given workload. If the

power, current, or thermal limit is reached, the processor will automatically reduce the

frequency to stay within its Processor Base Power (a.k.a TDP) limit. Turbo processor

frequencies are only active if the operating system is requesting the P0 state. For

more information on P-states and C-states, refer to Power Management on page 62.

Intel

Turbo Boost Technology 2.0 Power Control

Illustration of Intel

Turbo Boost Technology 2.0 power control is shown in the

following sections and figures. Multiple controls operate simultaneously allowing

customization for multiple systems thermal and power limitations. These controls

allow for turbo optimizations within system constraints and are accessible using MSR,

MMIO, and PECI interfaces.

Intel

Turbo Boost Technology 2.0 Power Monitoring

When operating in turbo mode, the processor monitors its own power and adjusts the

processor and graphics frequencies to maintain the average power within limits over a

thermally significant time period. The processor estimates the package power for all

components on the package. In the event that a workload causes the temperature to

exceed program temperature limits, the processor will protect itself using the Adaptive

Thermal Monitor.

Enhanced Intel SpeedStep

Technology

Enhanced Intel SpeedStep

Technology enables OS to control and select P-state. The

following are the key features of Enhanced Intel SpeedStep

Technology:

• Multiple frequencies and voltage points for optimal performance and power

efficiency. These operating points are known as P-states.

• Frequency selection is software controlled by writing to processor MSRs. The

voltage is optimized based on the selected frequency and the number of active

processors IA cores.

— Once the voltage is established, the PLL locks on to the target frequency.

— All active processor IA cores share the same frequency and voltage. In a

multi-core processor, the highest frequency P-state requested among all active

IA cores is selected.

2.4.8.1

2.4.8.2

2.4.8.3

2.4.9

Technologies—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 49

— Software-requested transitions are accepted at any time. If a previous

transition is in progress, the new transition is deferred until the previous

transition is completed.

• The processor controls voltage ramp rates internally to ensure glitch-free

transitions.

NOTE

Because there is low transition latency between P-states, a significant number of

transitions per-second are possible.

Intel

Thermal Velocity Boost (Intel

TVB)

Intel

Thermal Velocity Boost allows the processor IA core to opportunistically and

automatically increase the Intel

Turbo Boost Technology 2.0 frequency speed bins

whenever processor temperature and voltage allows.

The Intel

Thermal Velocity Boost feature is designed to increase performance of both

multi-threaded and singlethreaded workloads.

NOTE

Intel

Thermal Velocity Boost (Intel

TVB) may not be available on all SKUs.

Intel

Speed Shift Technology

Intel

Speed Shift Technology is an energy efficient method of frequency control by

the hardware rather than relying on OS control. OS is aware of available hardware P-

states and requests the desired P-state or it can let the hardware determine the P-

state. The OS request is based on its workload requirements and awareness of

processor capabilities. Processor decision is based on the different system constraints

for example Workload demand, thermal limits while taking into consideration the

minimum and maximum levels and activity window of performance requested by the

Operating System.

Intel

Advanced Vector Extensions 2 (Intel

AVX2)

Intel

Advanced Vector Extensions 2.0 (Intel

AVX2) is the latest expansion of the

Intel instruction set. Intel

AVX2 extends the Intel

Advanced Vector Extensions

(Intel

AVX) with 256-bit integer instructions, floating-point fused multiply-add (FMA)

instructions, and gather operations. The 256-bit integer vectors benefit math, codec,

image, and digital signal processing software. FMA improves performance in face

detection, professional imaging, and high-performance computing. Gather operations

increase vectorization opportunities for many applications. In addition to the vector

extensions, this generation of Intel processors adds new bit manipulation instructions

useful in compression, encryption, and general purpose software. For more

information on Intel

AVX, refer to http://www.intel.com/software/avx

Intel

Advanced Vector Extensions (Intel

AVX) are designed to achieve higher

throughput to certain integer and floating point operation. Due to varying processor

power characteristics, utilizing AVX instructions may cause a) parts to operate below

the base frequency b) some parts with Intel

Turbo Boost Technology 2.0 to not

2.4.10

2.4.11

2.4.12

Intel

Core

™

, Xeon

™

6300 And Xeon

™

E 2400 Processors—Technologies

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

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

achieve any or maximum turbo frequencies. Performance varies depending on

hardware, software and system configuration and you should consult your system

manufacturer for more information.

Intel

Advanced Vector Extensions refers to Intel

AVX or Intel

AVX2 .

For more information on Intel

AVX, refer to https://software.intel.com/en-us/isa-

extensions/intel-avx.

NOTE

Intel

AVX and AVX2 Technologies may not be available on all SKUs.

Intel

AVX2 Vector Neural Network Instructions (AVX2 VNNI)

Vector instructions for deep learning extension for AVX2.

NOTE

Intel

AVX and AVX2 Technologies may not be available on all SKUs.

Intel

64 Architecture x2APIC

The x2APIC architecture extends the xAPIC architecture that provides key

mechanisms for interrupt delivery. This extension is primarily intended to increase

processor addressability.

Specifically, x2APIC:

• Retains all key elements of compatibility to the xAPIC architecture:

— Delivery modes

— Interrupt and processor priorities

— Interrupt sources

— Interrupt destination types

• Provides extensions to scale processor addressability for both the logical and

physical destination modes

• Adds new features to enhance the performance of interrupt delivery

• Reduces the complexity of logical destination mode interrupt delivery on link

based architectures

The key enhancements provided by the x2APIC architecture over xAPIC are the

following:

• Support for two modes of operation to provide backward compatibility and

extensibility for future platform innovations:

— In xAPIC compatibility mode, APIC registers are accessed through memory

mapped interface to a 4K-Byte page, identical to the xAPIC architecture.

— In the x2APIC mode, APIC registers are accessed through the Model Specific

significantly increased processor addressability and some enhancements on

interrupt delivery.

2.4.12.1

2.4.13

Technologies—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 51