HP KC.32101.DMP Datasheet download pdf (Page 43)

Datasheet, Volume 1 43

Technologies

with maximum performance. Since the turbo feature is configurable and dependent on

many platform design limits outside of the processor control, the maximum

performance cannot be ensured.

Turbo Mode availability is independent of the number of active cores; however, the

Turbo Mode frequency is dynamic and dependent on the instantaneous application

power load, the number of active cores, user configurable settings, operating

environment, and system design.

3.4.1 Intel

Turbo Boost Technology Frequency

The processor's rated frequency assumes that all execution cores are active and are at

the sustained thermal design power (TDP). However, under typical operation not all

cores are active or at executing a high power workload. Therefore, most applications

are consuming less than the TDP at the rated frequency. Intel Turbo Boost Technology

takes advantage of the available TDP headroom and active cores are able to increase

their operating frequency.

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

takes the following into consideration to recalculate turbo frequency during runtime:

• The number of cores operating in the C0 state.

• The estimated core current consumption.

• The estimated package prior and present power consumption.

• 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 with its 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 Chapter 4, “Power Management”.

3.4.2 Intel

Turbo Boost Technology Graphics Frequency

The graphics render frequency is selected dynamically based on graphics workload

demand as permitted by the processor turbo control. The processors can optimize both

processor and integrated graphics performance through power sharing. The processor

cores and the integrated graphics core share a package power limit. If the graphics

core is not consuming enough power to reach the package power limit, the cores can

increase frequency to take advantage of the unused thermal power headroom. The

opposite can happen when the processor cores are not consuming enough power to

reach the package power limit. For the integrated graphics, this could mean an increase

in the render core frequency (above its rated frequency) and increased graphics

performance. Both the processor core(s) and the graphics render core can increase

frequency higher than possible without power sharing.

Note: The processor Utilization of turbo graphic frequencies requires that the Intel Graphics

driver to be properly installed. Turbo graphic frequencies are not dependent on the

operating system processor P-state requests and may turbo while the processor is in

any processor P-states.

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HP KC.32101.DMP Datasheet Page 43

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