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Appendix B - CPU Fan Protection
The CPU must be kept cool by using a CPU fan with heat sink.
Without sufficient air circulation across the CPU and heat sink, the
CPU will overheat damaging both the CPU and system board.
The system board supports the CPU Fan Protection function. It has
the capability of monitoring the CPU fan when the system boots. Once
it has detected that the CPU fan did not rotate, 5 warning beeps will
sound then the system will automatically power-off. This preventive
measure has been added to protect the CPU from damage and
insure a safe computing environment.
To use the CPU Fan Protection function, please follow the steps
below.
1. Before you power-on the system, make sure the heat sink and
CPU fan are correctly installed onto the CPU. The system is
capable of monitoring the CPU fan, therefore you must use a fan
with sense pin to support this function. Connect the CPU fan to
the CPU fan connector on the system board.
2. The "CPU Fan Protection" field in the PC Health Status submenu
of the BIOS must be set to "Enabled".
3. You may now power-on the system.
Three circumstances may occur causing the system to detect CPU
fan failure.
1. The CPU fan is not connected to the CPU fan connector on the
system board.
2. The CPU fan may be damaged. Replace it with a new fan.
3. The CPU fan did not rotate immediately upon system boot-up or
it took some time before the CPU fan rotated. Check whether the
heat sink and fan are mounted properly onto the CPU then restart
the system. If the same problem occurs, you must replace it with
a good quality fan - one that will rotate immediately once power
comes in and also one that will dissipate heat more efficiently,
otherwise, you have to disable this function in the BIOS.
CPU Fan Protection
B
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