Acer E3-1220 v3 KC.12201.3E3 用户手册

Intel Turbo Boost Technology allows processor cores and integrated graphics cores to

run faster than the baseline frequency. During a turbo event, the processor can

exceed its TDP power for brief periods. Turbo is invoked opportunistically and

automatically as long as the processor is conforming to its temperature, power

delivery, and current specification limits. Thus, thermal solutions and platform cooling

that are designed to less than thermal design guidance may experience thermal and

performance issues since more applications will tend to run at or near the maximum

power limit for significant periods of time.

Package processor core and internal graphics core powers are self monitored and

correspondingly reported out.
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With the processor turbo disabled, rolling average power over 5 seconds will not

exceed the TDP rating of the part for typical applications.

•

 on page 75)

— For the PL1: Package rolling average of the power set in POWER_LIMIT_1

(TURBO_POWER_LIMIT MSR 0610h bits [14:0]) over time window set in

POWER_LIMIT_1_TIME (TURBO_POWER_LIMIT MSR 0610h bits [23:17]) must

be less than or equal to the TDP package power as read from the

PACKAGE_POWER_SKU MSR 0614h for typical applications. Power control is

valid only when the processor is operating in turbo. PL1 lower than the

package TDP is not guaranteed.

— For the PL2: Package power will be controlled to a value set in

POWER_LIMIT_2 (TURBO_POWER_LIMIT MSR 0610h bits [46:32]). Occasional

brief power excursions may occur for periods of less than 10 ms over PL2.

The processor monitors its own power consumption to control turbo behavior,

assuming the following:
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The power monitor is not 100% tested across all processors.

•

The Power Limit 2 (PL2) control is only valid for power levels set at or above TDP

and under workloads with similar activity ratios as the product TDP workload. This

also assumes the processor is working within other product specifications.

•

Setting power limits (PL1 or PL2) below TDP are not ensured to be followed, and

are not characterized for accuracy.

•

Under unknown work loads and unforeseen applications the average processor

power may exceed Power Limit 1 (PL1).

•

Uncharacterized workloads may exist that could result in higher turbo frequencies

and power. If that were to happen, the processor Thermal Control Circuitry (TCC)

would protect the processor. The TCC protection must be enabled by the platform

for the product to be within specification.

An illustration of Intel Turbo Boost Technology power control is shown in the following

sections and figures. Multiple controls operate simultaneously allowing for

customization for multiple system thermal and power limitations. These controls

provide turbo optimizations within system constraints.

Intel

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 Xeon

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 Processor E3-1200 v3 Product Family

Datasheet – Volume 1 of 2

June 2013

74

Order No.: 328907-001