User`s manual

Chapter 4: BIOS
4-13
 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. The fan speed is controlled by the CPU die
temperature. When the CPU die temperature is higher, the fan speed will
be higher as well. Select "Server Mode" 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) Server Mode.
FAN1 Speed through FAN5 Speed
The speeds of the onboard fans (in rpm) are displayed here.