Abit Socket 462 System Board User Manual page 63

BIOS Setup
Voltage Monitoring:
Click <Enter> key to enter its submenu:
These items display the voltage of each element.
FAN Speed Monitoring:
Click <Enter> key to enter its submenu:
CPU/NB/SYS/AUX1/AUX2 FAN Speed:
These items display the speed of the fans connected to CPU, NB, SYS, AUX1 and AUX2 FAN headers.
CPU FAN Failed Shutdown
When set to [Enabled], the system will be shut down if the fan connected to CPUFAN header is failed.
NOTE: Only the fans with 3-pin plugs provide the speed monitoring function.
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User's Manual