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CPU cooling fan spins at 100% when starting PC

Chiru
By Chiru
in Cooling
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Posted

Hey

 

recently for whatever reason, whenever i start my PC one of the two CPU fans spins at 100%, i have a fan profile in Asus Ai suite 3, all my fans are set to run at 40% speed until cpu reaches 75 degrees (which never happens). All my fans run as they are supposed to, except that one fan. If i just move one node in the grap by a tiny bit and click apply, then move it back to 40% the fan stays that way. But as soon as i restart my PC, he keeps spinning at 100% again until i adjust it again manually.

 

What to do?

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Have you tried setting the same fan profile manually in the BIOS to see if that sticks? 

Intel HEDT and Server platform enthusiasts: Intel HEDT Xeon/i7 Megathread 

 

Main PC 

CPU: i9 7980XE @4.5GHz/1.22v/-2 AVX offset 

Cooler: EKWB Supremacy Block - custom loop w/360mm +280mm rads 

Motherboard: EVGA X299 Dark 

RAM:4x8GB HyperX Predator DDR4 @3200Mhz CL16 

GPU: Nvidia FE 2060 Super/Corsair HydroX 2070 FE block 

Storage:  1TB MP34 + 1TB 970 Evo + 500GB Atom30 + 250GB 960 Evo 

Optical Drives: LG WH14NS40 

PSU: EVGA 1600W T2 

Case & Fans: Corsair 750D Airflow - 3x Noctua iPPC NF-F12 + 4x Noctua iPPC NF-A14 PWM 

OS: Windows 11

 

Display: LG 27UK650-W (4K 60Hz IPS panel)

Mouse: EVGA X17

Keyboard: Corsair K55 RGB

 

Mobile/Work Devices: 2020 M1 MacBook Air (work computer) - iPhone 13 Pro Max - Apple Watch S3

 

Other Misc Devices: iPod Video (Gen 5.5E, 128GB SD card swap, running Rockbox), Nintendo Switch

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3 hours ago, Chiru said:

Hey

 

recently for whatever reason, whenever i start my PC one of the two CPU fans spins at 100%, i have a fan profile in Asus Ai suite 3, all my fans are set to run at 40% speed until cpu reaches 75 degrees (which never happens). All my fans run as they are supposed to, except that one fan. If i just move one node in the grap by a tiny bit and click apply, then move it back to 40% the fan stays that way. But as soon as i restart my PC, he keeps spinning at 100% again until i adjust it again manually.

 

What to do?

It may be that 40% is too close to the fans lowest rpm.

Try 50%?

 

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3 hours ago, Churl said:

It may be that 40% is too close to the fans lowest rpm.

Try 50%?

 

 

They are PWM, they could even run at 10%

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Try running the fan tuning again. It may take a few tries for the correct rpm range to be detected. You should also look for the minimum fan speed setting and disable it. 

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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