[SOLVED] Fans running at full speed despite no apparent overheating.

[fred_dijkstra]

Hi everyone!
Since yesterday, all three of my case fans have been running constantly at full speed even when the CPU is idle and registering no temperatures above 30°C (see image). The motherboard utility I've been using to adjust fan speeds doesn't take effect anymore.
From what I could gather, this seems likely to be a problem with the CPU's temperature sensor, but given that I'm never shown any temps above 30, what do you think could be the issue here?
Would a PWM fan control unit do the trick or do I need to get a new CPU/MB altogether?

CPU: i7 - 4790
MB: Gigabyte z97x Gaming 5

 

[Colif]

have you tried using something like speedfan to control the fans?
https://www.almico.com/sfdownload.php

It does sound like a sensor has broken, speedfan might be able to identify the problem as it should see all sensors on that board.

 

[fred_dijkstra]

have you tried using something like speedfan to control the fans?
https://www.almico.com/sfdownload.php

It does sound like a sensor has broken, speedfan might be able to identify the problem as it should see all sensors on that board.

Thank you for the suggestion, but as it turns out, the fans don't respond to speedfan either. I tried setting the max speed to 5%, but the RPM didn't change.
However, FanControl shows several CPU temperature sources constantly registering >70°C. As for trying to get manual fan control, no dice here either.

So where do I go from here? Fan control hardware unit?

 

[Colif]

I would think you probably can use a hub of some sort to control the fans. Obviously can't trust motherboard to get it right.
I don't know which would be best or best value, depends on what type of fans they are, have to assume they 4 pin.

Best Fan Controllers: 10 Picks for Hassle-Free Cooling %

Monitor and control your PC's internal temp with one of the best fan controllers. Whether you prefer manual or automatic cooling, we've got you covered!

www.highgroundgaming.com

 

[fred_dijkstra]

I would think you probably can use a hub of some sort to control the fans. Obviously can't trust motherboard to get it right.
I don't know which would be best or best value, depends on what type of fans they are, have to assume they 4 pin.

Best Fan Controllers: 10 Picks for Hassle-Free Cooling %

Monitor and control your PC's internal temp with one of the best fan controllers. Whether you prefer manual or automatic cooling, we've got you covered!

www.highgroundgaming.com

Thank you!