GL815E Endura Motherboard Product Manual
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Processor Type Processor Speed Operating Voltage
Intel Celeron 566 MHz ".50V, ".70V or ".75V
Intel Celeron 733 MHz ".65V, ".70V or ".75V
Intel Celeron 850 MHz ".70V or ".75V
Intel Pentium III 600 MHz ".65V, ".70V or ".75V
Intel Pentium III 733 MHz ".65V, ".70V or ".75V
Intel Pentium III 700 MHz ".65V, ".70V or ".75V
Intel Pentium III 850 MHz ".65V, ".70V or ".75V
Intel Pentium III 866 MHz ".65V, ".70V or ".75V
Intel Pentium III ".0 GHz ".70V or ".75V
2.14.2 Temperature Monitoring
There are two temperature sensors on the motherboard. The first measures the motherboard
temperature. Since the sensor is contained within the SIO, this will be a localized reading
dominated by the motherboard surface temperature around the SIO component.
The second temperature sensor is located on the processor die and thus accurately measures the
local die temperature. Since the local die temperature fluctuates rapidly with activity, the controller
within the SIO filters the signal to produce an average temperature.
2.14.3 Fan Monitoring
The motherboard includes two fan monitors that check the fan tachometer signal to determine the
rotation speed. Fan speed limits can be set to cause an alarm in the event that the fan rotates more
slowly than the limit. Using this method, early warning of a failing fan can be generated.
Note that when a fan is temperature controlled, the fan monitoring alarms for that fan should not be
used since the speed is determined by the temperature control mechanism and the fan will
sometimes be intentionally slowed or stopped.
The two fan tachometer monitors are assigned to fans as follows.
Usage by motherboard
Fan monitor 0 System fan (see motherboard layout section)
Fan monitor " Processor fansink (see motherboard layout section)
2.14.4 Fan Control
The motherboard supports individual variable speed controls for both the processor fansink and the
system fan by pulse-width modulation of the fan drive output voltage.
2.14.5 Tamper Detection
The motherboard supports tamper detection security that operates via a chassis tamper switch
connected to the front panel connector. When the motherboard detects this signal low the BIOS can
be configured to display a warning message or to require a password at the next boot. Since the
lithium cell powers the logic, the tamper detection continues to operate even if the board is
unpowered.
