I'm currently using BIOS 1103, which in many respects seem to be more stable than 0803 or other previous BIOS versions.
However, since version 1001 (and including 1103) I've got the problem that the system regularly (not always) fails to boot with the error message "CPU fan". After that I have to go to the setup and select "Save and exit" to continue booting.
This never happend with 0803 or any other previous BIOS versions!
My system is watercooled and the CPU fan signal is provided by the water cooling system. It shows a constant rate of more than 3400 rpm, as can be seen on this screenshot:
It doesn't really matter what I set in the CPU Fan settings. Currently I'm using this setting:
But even if I turn the CPU Fan control off completely, the error still comes up.
This problem made me check if the BIOS is really monitoring the CPU fan properly. For that I simulated a panic situation in the water cooling system, which made it turn off the CPU fan signal. I can see that the CPU fan speed is indeed shown as 0 in AIDA64.
However, the system continues to run!I'd expext the BIOS to shut down the system immediately in such a situation! But nothing of that kind is happening.
Note that I haven't installed the AI suite fan control service and I don't intend to install it as I see no reason to. The BIOS control of the fans is quite sufficient for me. But it should protect the system reliably!
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