Intel E7220 LF80564QH0778M Data Sheet
Product codes
LF80564QH0778M
Thermal Specifications
104
Document Number: 318080-002
speed dependent and will decrease as processor core frequencies increase. A small
amount of hysteresis has been included to prevent rapid active/inactive transitions of
the TCC when the processor temperature is near its maximum operating temperature.
Once the temperature has dropped below the maximum operating temperature, and
the hysteresis timer has expired, the TCC goes inactive and clock modulation ceases.
amount of hysteresis has been included to prevent rapid active/inactive transitions of
the TCC when the processor temperature is near its maximum operating temperature.
Once the temperature has dropped below the maximum operating temperature, and
the hysteresis timer has expired, the TCC goes inactive and clock modulation ceases.
With thermal solutions designed to each of the Intel
®
Xeon
®
Processor 7200 Series
and 7300 Series Thermal Profile it is anticipated that the TCC would only be activated
for very short periods of time when running the most power intensive applications. The
processor performance impact due to these brief periods of TCC activation is expected
to be so minor that it would be immeasurable. A thermal solution that is significantly
under designed may not be capable of cooling the processor even when the TCC is
active continuously Refer to the Dual-Core Intel® Xeon® Processor 7200 Series and
Quad-Core Intel® Xeon® Processor 7300 Series Thermal / Mechanical Design Guide
for information on designing a thermal solution.
for very short periods of time when running the most power intensive applications. The
processor performance impact due to these brief periods of TCC activation is expected
to be so minor that it would be immeasurable. A thermal solution that is significantly
under designed may not be capable of cooling the processor even when the TCC is
active continuously Refer to the Dual-Core Intel® Xeon® Processor 7200 Series and
Quad-Core Intel® Xeon® Processor 7300 Series Thermal / Mechanical Design Guide
for information on designing a thermal solution.
The duty cycle for the TCC, when activated by the TM1, is factory configured and
cannot be modified. The TM1 does not require any additional hardware, software
drivers, or interrupt handling routines.
6.2.3
Thermal Monitor 2
The Intel
®
Xeon
®
Processor 7200 Series and 7300 Series
adds supports for an
Enhanced Thermal Monitor capability known as Thermal Monitor 2 (TM2). This
mechanism provides an efficient means for limiting the processor temperature by
reducing the power consumption within the processor. The Thermal Monitor or
Enhanced Thermal Monitor must be enabled for the processor to be operating within
specifications. TM2 requires support for dynamic VID transitions in the platform.
mechanism provides an efficient means for limiting the processor temperature by
reducing the power consumption within the processor. The Thermal Monitor or
Enhanced Thermal Monitor must be enabled for the processor to be operating within
specifications. TM2 requires support for dynamic VID transitions in the platform.
Note:
Not all Intel
®
Xeon
®
Processor 7200 Series and 7300 Series are capable of supporting
TM2.
When Thermal Monitor 2 is enabled, and a high temperature situation is detected, the
Thermal Control Circuit (TCC) will be activated for all processor cores. The TCC causes
the processor to adjust its operating frequency (via the bus multiplier) and input
voltage (via the VID signals). This combination of reduced frequency and VID results in
a reduction to the processor power consumption.
Thermal Control Circuit (TCC) will be activated for all processor cores. The TCC causes
the processor to adjust its operating frequency (via the bus multiplier) and input
voltage (via the VID signals). This combination of reduced frequency and VID results in
a reduction to the processor power consumption.
A processor enabled for Thermal Monitor 2 includes two operating points, each
consisting of a specific operating frequency and voltage, which is identical for both
processor dies. The first operating point represents the normal operating condition for
the processor. Under this condition, the core-frequency-to-system-bus multiplier
utilized by the processor is that contained in the CLOCK_FLEX_MAX MSR and the VID
that is specified in
consisting of a specific operating frequency and voltage, which is identical for both
processor dies. The first operating point represents the normal operating condition for
the processor. Under this condition, the core-frequency-to-system-bus multiplier
utilized by the processor is that contained in the CLOCK_FLEX_MAX MSR and the VID
that is specified in
The second operating point consists of both a lower operating frequency and voltage.
The lowest operating frequency is determined by the lowest supported bus ratio (1/6
for the Intel
The lowest operating frequency is determined by the lowest supported bus ratio (1/6
for the Intel
®
Xeon
®
Processor 7200 Series and 7300 Series). When the TCC is
activated, the processor automatically transitions to the new frequency. This transition
occurs rapidly, on the order of 5 µs. During the frequency transition, the processor is
unable to service any bus requests, and consequently, all bus traffic is blocked. Edge-
triggered interrupts will be latched and kept pending until the processor resumes
operation at the new frequency.
occurs rapidly, on the order of 5 µs. During the frequency transition, the processor is
unable to service any bus requests, and consequently, all bus traffic is blocked. Edge-
triggered interrupts will be latched and kept pending until the processor resumes
operation at the new frequency.
Once the new operating frequency is engaged, the processor will transition to the new
core operating voltage by issuing a new VID code to the voltage regulator. The voltage
regulator must support dynamic VID steps in order to support Thermal Monitor 2.
During the voltage change, it will be necessary to transition through multiple VID codes
core operating voltage by issuing a new VID code to the voltage regulator. The voltage
regulator must support dynamic VID steps in order to support Thermal Monitor 2.
During the voltage change, it will be necessary to transition through multiple VID codes