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Old 23-07-18, 07:48 AM
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tolagarf tolagarf is offline
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Controlling Fan Speed Using Temp Sensor with BIOS

So I have a temperature sensor attached to my water loop and I wanted to adjust my fan speed depending on the water temperature through the BIOS, but I can't seem to get the fans to react to it, at all.

Motherboard is an ASUS Z270 TUF Mark.1, and the temp sensor reports lowest temps at 37C and highest at 45C. So I set up a curve in the BIOS selecting the source as Temp Sensor 1 where it's located, I can see the BIOS reporting a temperature, but there is absolutely no reaction from the fans at all. I used HWInfo to check the temperatures going up while stress testing the system, so it's not like the temp sensor isn't working.

I used the following PWM curve in the BIOS

PWM connector: Chassis Fan 2
Source: Temp Sensor 1
Max: 50C / 60% duty cycle
Middle: 45C / 50% duty cycle
Min: 38C / 25% duty cycle

So what's going on here? Is the BIOS just failing to control the PWM curve when Temp Sensor is selected as source? I'm starting to wonder if this is the case, or something else is happening I haven't thought of.

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Old 23-07-18, 09:36 AM
Warchild Warchild is offline
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You can do it via external controllers like aquaero but I recall I had to install the AIsuite that came with my Z97 TUF to do it via mobo
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Old 23-07-18, 10:16 AM
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tolagarf tolagarf is offline
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Quote:
Originally Posted by Warchild View Post
You can do it via external controllers like aquaero but I recall I had to install the AIsuite that came with my Z97 TUF to do it via mobo
I got it working, it was a stupid mistake of my own doing

Before I controlled my fans with SpeedFan dependent on GPU temperature, and even though I disabled that part, I was still using SpeedFan to monitor fan RPM's. As it turns out SpeedFan had taken full control of the PWM on that fan connector, hence the fan speed never changed.

It's working now, but now I'm dealing with fans ramping up/down on the 43C degree marker on the water temp. Not sure why the heck that happens, even though I set the fans to ramp its speeds up/down with 12/25 seconds in the BIOS. Will probably require a lot of experimentation
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Old 23-07-18, 10:37 AM
Warchild Warchild is offline
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Quote:
Originally Posted by tolagarf View Post
I got it working, it was a stupid mistake of my own doing

Before I controlled my fans with SpeedFan dependent on GPU temperature, and even though I disabled that part, I was still using SpeedFan to monitor fan RPM's. As it turns out SpeedFan had taken full control of the PWM on that fan connector, hence the fan speed never changed.

It's working now, but now I'm dealing with fans ramping up/down on the 43C degree marker on the water temp. Not sure why the heck that happens, even though I set the fans to ramp its speeds up/down with 12/25 seconds in the BIOS. Will probably require a lot of experimentation
sounds like its not set as a curve but more as a step profile.
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Old 23-07-18, 10:43 AM
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tolagarf tolagarf is offline
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Originally Posted by Warchild View Post
sounds like its not set as a curve but more as a step profile.
Hmm.. It's possible. Might require AI Suite to do that, but I really don't like that software. I guess if I want proper control, buying an Aquaero 6 is the best option. It's something I've been considering for some time
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