BySperax
Good evening,
I have set 2 fans to full speed in the BIOS, but this maximum speed is no longer available after 5 seconds of logging into Windows and both fans throttle down?
In the BIOS, so before that, they are always at full speed, the fans have a PWM connection.
What could be the reason for this?
Thank you!
(2 votes)
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That’s right!
The operating system controls the fans. But this can have malfunctions or crashes. Then the fans would no longer be correctly regulated and this can cause damage.
If the operating system fails or the operating system cannot control the fans anyway, then the hardware of the motherboard itself must control. And you can adjust it in the BIOS.
The BIOS settings apply only if the operating system does not work or the fans cannot control. In this case, the maximum limit (overtemperature setting) also applies, i.e. when the control is taken away from the operating system, although it still sends commands for control to the hardware.
The fan speeds must be set in the operating system. In the BIOS you will only find what to do if the operating system is not running, so it is crashed or while you first install an operating system.
Aso, I’ve always thought it’s all in the BIOS, thank you.
The BIOS has hardly any function today.
The operating system used to chase practically everything through the BIOS, because only that knew how the hardware works. Therefore, the name “Basic I/O System”.
Then the real-time clock with a small battery-powered memory came to it and then settings could be electronically adjusted instead of by soldering/plugging.
But the BIOS loses more and more importance. Nothing goes more about the “Basic input/output functions”. They are too slow and can handle only a fraction of the modern functions of most components. That’s why the operating system “driver” has installed that make the BIOS replace.
In a modern operating system, the BIOS has only the task of charging and starting the hardware settings such as boot order, features of the board, etc. and only the boot loader of the operating system. From there, the operating system does everything itself.
Couldn’t be normal.
Setting saved in the BIOS?
A software that might have access to fans?
Windows in energy saving mode or “best performance”?
The fan speed in the bios depends on the temperature. Have you set 100% at low temperatures,
Was a program, yes, thank you.
I checked again and he really did.