Intel Q9400S Design Guidelines - Page 15

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Introduction Term Thermal Monitor TIM TMA TS CA CS SA Description A feature on the processor that attempts to keep the processor die temperature within factory specifications. Thermal Interface Material: The thermally conductive compound between the heatsink and the processor case. This material fills the air gaps and voids, and enhances the transfer of the heat from the processor case to the heatsink. Thermal Module Assembly. The heatsink, fan and duct assembly for the BTX thermal solution Heatsink temperature measured on the underside of the heatsink base, at a location corresponding to TC. Case-to-ambient thermal characterization parameter (psi). A measure of thermal solution performance using total package power. Defined as (TC - TA) / Total Package Power. NOTE: Heat source must be specified for  measurements. Case-to-sink thermal characterization parameter. A measure of thermal interface material performance using total package power. Defined as (TC - TS) / Total Package Power. NOTE: Heat source must be specified for  measurements. Sink-to-ambient thermal characterization parameter. A measure of heatsink thermal performance using total package power. Defined as (TS - TA) / Total Package Power. NOTE: Heat source must be specified for  measurements. § Thermal and Mechanical Design Guidelines 15

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Introduction
Thermal and Mechanical Design Guidelines
15
Term
Description
Thermal
Monitor
A feature on the processor that attempts to keep the processor die
temperature within factory specifications.
TIM
Thermal Interface Material: The thermally conductive compound between
the heatsink and the processor case. This material fills the air gaps and
voids, and enhances the transfer of the heat from the processor case to
the heatsink.
TMA
Thermal Module Assembly. The heatsink, fan and duct assembly for the
BTX thermal solution
T
S
Heatsink temperature measured on the underside of the heatsink base, at
a location corresponding to
T
C
.
CA
Case-to-ambient thermal characterization parameter (psi). A measure of
thermal solution performance using total package power. Defined as
(T
C
– T
A
) / Total Package Power.
NOTE:
Heat source must be specified for
measurements.
CS
Case-to-sink thermal characterization parameter. A measure of thermal
interface material performance using total package power. Defined as
(T
C
– T
S
) / Total Package Power.
NOTE:
Heat source must be specified for
measurements.
SA
Sink-to-ambient thermal characterization parameter. A measure of
heatsink thermal performance using total package power. Defined as
(T
S
– T
A
) / Total Package Power.
NOTE:
Heat source must be specified for
measurements.
§