Introduction
R
Thermal/Mechanical Design Guide 13
Term Description
FSC
Fan Speed Control: Thermal solution that includes a variable fan speed which is
driven by a PWM signal and uses the on-die thermal diode as a reference to change
the duty cycle of the PWM signal.
T
CONTROL_BASE
Constant from the processor datasheet that is added to the T
CONTROL_OFFSET
that
results in the value for
T
CONTROL
T
CONTROL_OFFSET
Value read by the BIOS from a processor MSR and added to the T
CONTROL_BASE
that
results in the value for
T
CONTROL
T
CONTROL
T
CONTROL
is the specification limit for use with the on-die thermal diode.
PWM
Pulse width modulation is a method of controlling a variable speed fan. The enabled 4
wire fans use the PWM duty cycle % from the fan speed controller to modulate the fan
speed.
Health Monitor
Component
Any standalone or integrated component that is capable of reading the processor
temperature and providing the PWM signal to the 4 pin fan header.
BTX
Balanced Technology Extended: BTX is an enhanced form factor specification for
desktop platforms.
TMA
Thermal Module Assembly. The heatsink, fan and duct assembly for the BTX thermal
solution.
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