Intel i5-4300Y CL8064701558601 Data Sheet

cTDP consists of three modes as shown in the following table.

Nominal

This is the processor's rated frequency and TDP.

TDP-Up

When extra cooling is available, this mode specifies a higher TDP and higher

guaranteed frequency versus the nominal mode.

TDP-Down

When a cooler or quieter mode of operation is desired, this mode specifies a lower TDP

and lower guaranteed frequency versus the nominal mode.

In each mode, the Intel Turbo Boost Technology 2.0 power and frequency ranges are

reprogrammed and the OS is given a new effective HFM operating point. The Intel

DPTF driver assists in all these operations. The cTDP mode does not change the max

per-core turbo frequency.

Low-Power Mode (LPM) can provide cooler and quieter system operation. By

combining several active power limiting techniques, the processor can consume less

power while running at equivalent low frequencies. Active power is defined as

processor power consumed while a workload is running and does not refer to the

power consumed during idle modes of operation. LPM is only available using the Intel

DPTF driver.

Through the DPTF driver, LPM can be configured to use each of the following methods

to reduce active power:
•

Restricting Intel Turbo Boost Power limits and IA core Turbo Boost availability

•

Off-Lining core activity (Move processor traffic to a subset of cores)

•

Placing an IA Core at LFM or LSF (Lowest Supported Frequency)

•

Utilizing IA clock modulation

•

Reducing number of active EUs to GT2 equivalent (Applicable for GT3 SKUs Only)

•

LPM power as listed in the TDP Specifications table is defined at a point which IA

cores working at MFM, GT = RPn and 1 core active

Off-lining core activity is the ability to dynamically scale a workload to a limited subset

of cores in conjunction with a lower turbo power limit. It is one of the main vectors

available to reduce active power. However, not all processor activity is ensured to be

able to shift to a subset of cores. Shifting a workload to a limited subset of cores

allows other cores to remain idle and save power. Therefore, when LPM is enabled,

less power is consumed at equivalent frequencies.

Minimum Frequency Mode (MFM) of operation, which is the lowest supported

frequency (LSF) at the LFM voltage, has been made available for use under LPM for

further reduction in active power beyond LFM capability to enable cooler and quieter

modes of operation.

The following notes apply to 

on page 63 and 

on page 64.

Mobile 4th Generation Intel

®

 Core

™

 Processor Family, Mobile Intel

®

 Pentium

®

 Processor Family, and Mobile Intel

®

 Celeron

®

Processor Family

Datasheet – Volume 1 of 2

July 2014

62

Order No.: 329001-007