Intel Phi 7120A SC7120A Fiche De Données
Codes de produits
SC7120A
Intel
®
Xeon Phi™ Coprocessor Datasheet
Document ID Number: 328209 003EN
58
Each frequency setting of the coprocessor requires a specific voltage identification
(VID) voltage setting in order to guarantee proper operation, and each P-state
corresponds to one of these frequency and voltage pairs. Each device is uniquely
calibrated and programmed at the factory with its appropriate frequency and voltage
pairs. As a result, it is possible that two devices with the same frequency specification
may have different voltage settings.
(VID) voltage setting in order to guarantee proper operation, and each P-state
corresponds to one of these frequency and voltage pairs. Each device is uniquely
calibrated and programmed at the factory with its appropriate frequency and voltage
pairs. As a result, it is possible that two devices with the same frequency specification
may have different voltage settings.
Intel
®
Xeon Phi™ coprocessor supports Turbo Mode which, at the request of the
operating system, will opportunistically and automatically run the coprocessor at a
higher frequency than its TDP rated value. When the card is operating below its
specified power and temperature limits, the Power Control Unit (PCU) within the card
will select the highest possible turbo frequency while still remaining within the power
and thermal specifications.
higher frequency than its TDP rated value. When the card is operating below its
specified power and temperature limits, the Power Control Unit (PCU) within the card
will select the highest possible turbo frequency while still remaining within the power
and thermal specifications.
The highest Turbo Mode P-state is P01, followed by sequentially lower frequency states
of P02, P03.… on down to the lowest Turbo state of P0n. P-states within the standard
frequency range are referred to as P1, P2, P3…. with Pn being the lowest frequency
state. Below Pn is one final P-state called LFM or Low Frequency Mode. LFM is only used
by the coprocessor when the device is over the PROCHOT trip temperature and is
attempting to cool down by reducing power dissipation. LFM reduces the frequency to
the absolute lowest possible value, but the voltage will remain the same as P-state Pn.
See
of P02, P03.… on down to the lowest Turbo state of P0n. P-states within the standard
frequency range are referred to as P1, P2, P3…. with Pn being the lowest frequency
state. Below Pn is one final P-state called LFM or Low Frequency Mode. LFM is only used
by the coprocessor when the device is over the PROCHOT trip temperature and is
attempting to cool down by reducing power dissipation. LFM reduces the frequency to
the absolute lowest possible value, but the voltage will remain the same as P-state Pn.
See
. All parts within a given SKU will have the same P-states, but P-states
and Turbo frequencies may vary across SKUs.
Once the OS requests turbo operation, by selecting the P01 state, the coprocessor will
automatically select the best P0n state that will remain within the specified thermal and
power limits. Determination of this P-state is based on the number of active cores, the
current draw, the average power consumption and the temperature. If these conditions
change, the turbo P-state may also change or even be reduced to the non-turbo P-state
of P1. In turbo mode, the coprocessor is free to change the P-state at any time without
giving advanced notice to the OS. Although the OS may request P01, there is no
guarantee that a turbo frequency will be selected. If the conditions are not sufficient to
allow the coprocessor to run above P1, then it will remain in P1. The amount of time the
processor can spend in turbo mode may be influenced by the workload and the
operating environment.
automatically select the best P0n state that will remain within the specified thermal and
power limits. Determination of this P-state is based on the number of active cores, the
current draw, the average power consumption and the temperature. If these conditions
change, the turbo P-state may also change or even be reduced to the non-turbo P-state
of P1. In turbo mode, the coprocessor is free to change the P-state at any time without
giving advanced notice to the OS. Although the OS may request P01, there is no
guarantee that a turbo frequency will be selected. If the conditions are not sufficient to
allow the coprocessor to run above P1, then it will remain in P1. The amount of time the
processor can spend in turbo mode may be influenced by the workload and the
operating environment.
Turbo mode may be disabled through the SMC Control Panel, or by configuring the
operating system such that it never requests the P01 P-state.
operating system such that it never requests the P01 P-state.
Only the 7120A, 7120D, 7120P and 7120X SKUs support Turbo mode.