IBM Intel Xeon E7430 44E4470 Data Sheet
Product codes
44E4470
Thermal Specifications
100
Intel® Xeon® Processor 7400 Series Datasheet
IA32_CLOCK_MODULATION MSR. In On-Demand mode, the duty cycle can be
programmed from 12.5% on/ 87.5% off to 87.5% on/12.5% off in 12.5% increments.
On-Demand mode may be used in conjunction with the Intel Thermal Monitor;
however, if the system tries to enable On-Demand mode at the same time the TCC is
engaged, the factory configured duty cycle of the TCC will override the duty cycle
selected by the On-Demand mode.
programmed from 12.5% on/ 87.5% off to 87.5% on/12.5% off in 12.5% increments.
On-Demand mode may be used in conjunction with the Intel Thermal Monitor;
however, if the system tries to enable On-Demand mode at the same time the TCC is
engaged, the factory configured duty cycle of the TCC will override the duty cycle
selected by the On-Demand mode.
6.2.5
PROCHOT# Signal
An external signal, PROCHOT# (processor hot) is asserted when the temperature of
either processor die has reached its factory configured trip point. If the Intel Thermal
Monitor is enabled (note that the Intel Thermal Monitor must be enabled for the
processor to be operating within specification), the TCC will be active when PROCHOT#
is asserted. The processor can be configured to generate an interrupt upon the
assertion or de-assertion of PROCHOT#. Refer to the Intel
either processor die has reached its factory configured trip point. If the Intel Thermal
Monitor is enabled (note that the Intel Thermal Monitor must be enabled for the
processor to be operating within specification), the TCC will be active when PROCHOT#
is asserted. The processor can be configured to generate an interrupt upon the
assertion or de-assertion of PROCHOT#. Refer to the Intel
®
64 and IA-32 Architectures
Software Developer’s Manual.
PROCHOT# is designed to assert at or a few degrees higher than maximum T
CASE
(as
specified by Thermal Profile) when dissipating TDP power, and cannot be interpreted as
an indication of processor case temperature. This temperature delta accounts for
processor package, lifetime and manufacturing variations and attempts to ensure the
Thermal Control Circuit is not activated below maximum T
an indication of processor case temperature. This temperature delta accounts for
processor package, lifetime and manufacturing variations and attempts to ensure the
Thermal Control Circuit is not activated below maximum T
CASE
when dissipating TDP
power. There is no defined or fixed correlation between the PROCHOT# trip
temperature, or the case temperature. Thermal solutions must be designed to the
processor specifications and cannot be adjusted based on experimental measurements
of T
temperature, or the case temperature. Thermal solutions must be designed to the
processor specifications and cannot be adjusted based on experimental measurements
of T
CASE
, or PROCHOT#.
6.2.6
FORCEPR# Signal
The FORCEPR# (force power reduction) input can be used by the platform to cause the
Intel® Xeon® Processor 7400 Series to activate the TCC. If the Intel Thermal Monitor
is enabled, the TCC will be activated upon the assertion of the FORCEPR# signal.
Assertion of the FORCEPR# signal will activate TCC for all processor cores. The TCC will
remain active until the system deasserts FORCEPR#. FORCEPR# is an asynchronous
input. FORCEPR# can be used to thermally protect other system components. To use
the VR as an example, when FORCEPR# is asserted, the TCC circuit in the processor
will activate, reducing the current consumption of the processor and the corresponding
temperature of the VR.
Intel® Xeon® Processor 7400 Series to activate the TCC. If the Intel Thermal Monitor
is enabled, the TCC will be activated upon the assertion of the FORCEPR# signal.
Assertion of the FORCEPR# signal will activate TCC for all processor cores. The TCC will
remain active until the system deasserts FORCEPR#. FORCEPR# is an asynchronous
input. FORCEPR# can be used to thermally protect other system components. To use
the VR as an example, when FORCEPR# is asserted, the TCC circuit in the processor
will activate, reducing the current consumption of the processor and the corresponding
temperature of the VR.
It should be noted that assertion of FORCEPR# does not automatically assert
PROCHOT#. As mentioned previously, the PROCHOT# signal is asserted when a high
temperature situation is detected. A minimum pulse width of 500 µs is recommended
when FORCEPR# is asserted by the system. Sustained activation of the FORCEPR#
signal may cause noticeable platform performance degradation.
PROCHOT#. As mentioned previously, the PROCHOT# signal is asserted when a high
temperature situation is detected. A minimum pulse width of 500 µs is recommended
when FORCEPR# is asserted by the system. Sustained activation of the FORCEPR#
signal may cause noticeable platform performance degradation.
Refer to the
Caneland Platform Design Guide
for details on implementing the
FORCEPR# signal feature.
6.2.7
THERMTRIP# Signal
Regardless of whether or not the Intel Thermal Monitor or Intel Thermal Monitor 2 is
enabled, in the event of a catastrophic cooling failure, the processor will automatically
shut down when either die has reached an elevated temperature (refer to the
THERMTRIP# definition in
enabled, in the event of a catastrophic cooling failure, the processor will automatically
shut down when either die has reached an elevated temperature (refer to the
THERMTRIP# definition in
). At this point, the FSB signal THERMTRIP# will go
active and stay active as described in
. THERMTRIP# activation is independent