Datasheet

Functional Description
160 Intel® Xeon® Processor D-1500 Product Family
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
3.21.1.1.2 Thermal Sensor Accuracy (T
accuracy
)
Taccuracy for Intel® Xeon® Processor D-1500 Product Family is ±5 °C in the
temperature range 90 °C to 120 °C. Taccuracy is ±10 °C for temperatures from 45 °C –
90 °C. Intel® Xeon® Processor D-1500 Product Family may not operate above
+108 °C. This value is based on product characterization and is not ensured by
manufacturing test.
Software has the ability to program the Tcat, Thot, and Taux trip points, but these trip
points should be selected with consideration for the thermal sensor accuracy and the
quality of the platform thermal solution. Overly conservative (unnecessarily low)
temperature settings may unnecessarily degrade performance due to frequent
throttling, while overly aggressive (dangerously high) temperature settings may fail to
protect the part against permanent thermal damage.
3.21.2 Intel® Xeon® Processor D-1500 Product Family Thermal
Throttling
Occasionally Intel® Xeon® Processor D-1500 Product Family may operate in conditions
that exceed its maximum operating temperature. In order to protect itself and the
system from thermal failure, Intel® Xeon® Processor D-1500 Product Family is
capable of reducing its overall power consumption and as a result, lower its
temperature. This is achieved by:
• Forcing the SATA device and interface in to a lower power state
• Reducing the Intel Management Engine (Intel ME) clock frequency
The severity of the throttling response is defined by four global Intel® Xeon®
Processor D-1500 Product Family throttling states referred to as T-states. In each T-
state, the throttling response will differ per interface, but will operate concurrently
when a global T-state is activated. A T-state corresponds to a temperature range. The
T-states are defined in Ta b le 3- 4 9 .
Enabling of this feature requires appropriate Intel Management Engine firmware and
configuration of the following registers shown in Ta ble 3- 5 0 .
Table 3-49. Intel® Xeon® Processor D-1500 Product Family Thermal Throttle States (T-
states)
State Description
T0 Normal operation, temperature is less than the T1 trip point temperature
T1 Temperature is greater than or equal to the T1 trip point temperature, but less than the T2
trip point temperature. The default temperature is T
j,max
at 108 °C
T2 Temperature is greater than or equal to the T2 trip point temperature, but less than the T3
trip point temperature. The default temperature is 112 °C
T3 Temperature is greater than or equal to the T3 trip point temperature. The default
temperature is 116 °C
Table 3-50. Intel® Xeon® Processor D-1500 Product Family Thermal Throttling
Configuration Registers
Register Name Register Location
TL – Throttle Levels TBARB+40h Section 16.2.10