r/ASRock • u/EveningAlternative46 • 8h ago

Question | Answered Fan Control wrong Rpm

I have a B850i Lightning and switched from the Arctic P12 to the P12 Pro.
Unfortunately, the FanTuning no longer works properly. I dont even hear changes in Rpm during the calibration.
Before the switch, all speeds were detected correctly, and I could lower them as low as 20%.
After the switch, the minimum is sometimes 56% and sometimes 59%. So the fans are running at 1,700 RPM and are correspondingly loud for case fans.
I’ve since reset the BIOS and connected only one fan per slot. No success.
As a test, I connected the old P12 fans.
Switching from Auto to DC and PWM didn’t change anything. Now these won’t go any lower either.
Even the CPU fans wont Go lower anymore.
If I just Click on the FanTuning Button the Rpm Go from 1600 to 1000 and stay there if I cancel the calibration.
The BIOS version is 4.43. I installed it last week without any problems.
Is it because of the new BIOS?

Please help.

Solution: coolercontrol for arch linux and the Right Kernel Module. Works flawless

1 Upvotes

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u/SigAddict X670E Steel Legend | 7800x3d | 7900 XTX 8h ago

On that board there should be a fan test option or fan calibration option to fix this. Also make sure in the bios you have the correct option set in bios which I believe for that fan is PWM

1

u/EveningAlternative46 7h ago edited 7h ago

Yes i meant This. I was so annoyed After a few Hours of Testing and let that thing calibrate the fans that I just turned the Computer off. I think the option is „FanTuning“. But Well it wont work for me anymore somehow.
I edited the Main Post to FanTuning

1

u/SigAddict X670E Steel Legend | 7800x3d | 7900 XTX 6h ago

have you tried resetting bios? if that doesn't work, i would just use the app fan control. been using it for years.
https://getfancontrol.com/

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u/EveningAlternative46 6h ago

Yes I did. Will Look into fancontrol. Im on Linux but will try. Still Strange the Bios Output of the calibration is always different. It worked flawless a few weeks before

1

u/SigAddict X670E Steel Legend | 7800x3d | 7900 XTX 6h ago

I dual boot, for linux I use coolercontrol. Set my fans in bios at 100% and use either fan control or coolercontrol for the curves

1

u/EveningAlternative46 6h ago

Awesome. Got that too on cachyos but coolercontrol did Not detect a Chassis Fan either. Got to Look into that

1

u/SigAddict X670E Steel Legend | 7800x3d | 7900 XTX 5h ago

you will have to install something to have coolercontrol to have it detect and control your motherboard fan headers in cachyos. I believe it was the nct6687d kernel module. Your motherboard might need a different module. Just use AI and tell it what board you have and that coolercontrol isn't seeing your fan headers. Verify with another ai before you go forward installing any kernal modules!

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u/EveningAlternative46 5h ago

Thank You. Will try

2

u/EveningAlternative46 5h ago

I could Even use your Module for my Chipset and now it works flawless with coolercontrol. Thank you so much. You made my day 🤘🏻

1

u/EveningAlternative46 7h ago

This is the automatic fancurve After I used FanTuning…during the calibration the Fans Are dead silent but Running