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Chapter 4: AMI BIOS
4-19
Notes:
The CPU thermal technology that reports absolute temperatures (Celsius/Fahr-
enheit) has been upgraded to a more advanced feature by Intel in its newer
processors. The basic concept is each CPU is embedded by unique temperature
information that the motherboard can read. This ‘Temperature Threshold’ or
‘Temperature Tolerance’ has been assigned at the factory and is the baseline
on which the motherboard takes action during different CPU temperature condi-
tions (i.e., by increasing CPU Fan speed, triggering the Overheat Alarm, etc).
Since CPUs can have different ‘Temperature Tolerances’, the installed CPU can
now send information to the motherboard what its ‘Temperature Tolerance’ is,
and not the other way around. This results in better CPU thermal management.
Supermicro has leveraged this feature by assigning a temperature status to
certain thermal conditions in the processor (Low, Medium and High). This makes
it easier for the user to understand the CPU’s temperature status, rather than by
just simply seeing a temperature reading (i.e., 25
o
C).
The information provided above is for your reference only. For more information
on thermal management, please refer to Intel’s website at www.Intel.com.
System Temperature: The system temperature will be displayed (in degrees in
Celsius and Fahrenheit) as it is detected by the BIOS.
Fan Speed Readings
This feature displays the fan speed readings from Fan1 through Fan 8.
Fan Speed Control Modes
This feature allows the user to decide how the system controls the speeds of the
onboard fans. The CPU temperature and the fan speed are correlative. When the
CPU on-die temperature increases, the fan speed will also increase for effective
system cooling. Select "Full Speed/FS" to allow the onboard fans to run at full
speed for maximum cooling. The FS setting is recommended for special system
conguration or debugging. Select "Performance/PF" for better system cooling. The
PF setting is recommended for high-power-consuming and high-density systems.
Select "Balanced/BL" for the onboard fans to run at a speed that will balance the
needs between system cooling and power saving. The BL setting is recommended
for regular systems with normal hardware congurations. Select "Energy Saving/ES"
for best power efciency and maximum quietness. The Options are: Full Speed/FS,
Performance/PF, Balanced/BL, and Energy Saving/ES.
Voltage Readings
The following voltage readings will be displayed.
CPU1 Vcore, CPU2 Vcore, VTT CPU1, VTT CPU2, CPU1 DDR3, CPU2 DDR3,
1.5V, 1.8V, 5V, 12V, 3.3V, 3.3VSB, VBAT and PIV1 IOH