Chapter 4: BIOS
4-13
System Health Monitor
CPU Overheat Temperature
Use the "+" and "-" keys to set the CPU temperature threshold to between 65
o
and 90
o
C. When this threshold is exceeded, the overheat LED on the chas-
sis will light up and an alarm will sound. The LED and alarm will turn off once
the CPU temperature has dropped to 5 degrees below the threshold set. The
default setting is
72
o
C
.
The other items in the submenu are all systems monitor displays for the follow-
ing information:
CPU1 Temperature, CPU2 Temperature (for dual CPU systems), System Tem-
perature, CPU1 Vcore, CPU2 Vcore (for dual CPU systems), +5 Vin, +12Vin,
-12V Vcc, DDRA VTT, DDRB VTT, 1.2V for Hyper-Transport, 2.5V, 5V standby,
2.5V standby and battery voltage.
System Fan Monitor
Fan Speed Control Modes
This feature allows the user to determine how the system will control the
speed of the onboard fans. If the option is set to "3-pin fan", the fan speed
is controlled based upon the CPU die temperature. When the CPU die
temperature is higher, the fan speed will be higher as well. If the option is
set to "4-pin", the fan speed will be controlled by the Thermal Management
Settings pre-confi gured by the user with this setting. Select "3-pin" if your
chassis came with 3-pin fan headers. Select "4-pin" if your chassis came
with 4-pin fan headers. Select "Workstation" if your system is used as a
Workstation. Select "Server" if your system is used as a Server. Select
"Disable" to disable the fan speed control function to allow the onboard fans
to continuously run at full speed (12V). The options are
1) Disable, Full
Speed
and 2) 3-pin (Server).
FAN1 Speed through FAN5 Speed
The speeds of the onboard fans (in rpm) are displayed here.
