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My cpu cooler turns off when windows boots.

Rylyguy
By Rylyguy
in Troubleshooting
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So I thought my cpu cooler was just broken because the fan wasn’t spinning when my cpu was at 80 degrees. I checked the fan curves in my bios and they’re fine. But now I’m noticing that sometimes my cpu cooler and my other fan will spin. But sometimes just one or the other. And sometimes neither will spin. Now after resetting my bios both my fans were spinning until I saw the spinning windows circle and now only my case fan is spinning. What could the problem be?

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The CPU fan is connected to the proper CPU fan header, right? 

Main System: Phobos

AMD Ryzen 7 2700 (8C/16T), ASRock B450 Steel Legend, 16GB G.SKILL Aegis DDR4 3000MHz, AMD Radeon RX 570 4GB (XFX), 960GB Crucial M500, 2TB Seagate BarraCuda, Windows 10 Pro for Workstations/macOS Catalina

 

Secondary System: York

Intel Core i7-2600 (4C/8T), ASUS P8Z68-V/GEN3, 16GB GEIL Enhance Corsa DDR3 1600MHz, Zotac GeForce GTX 550 Ti 1GB, 240GB ADATA Ultimate SU650, Windows 10 Pro for Workstations

 

Older File Server: Yet to be named

Intel Pentium 4 HT (1C/2T), Intel D865GBF, 3GB DDR 400MHz, ATI Radeon HD 4650 1GB (HIS), 80GB WD Caviar, 320GB Hitachi Deskstar, Windows XP Pro SP3, Windows Server 2003 R2

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2 minutes ago, ProjectBox153 said:

The CPU fan is connected to the proper CPU fan header, right? 

Yes. And I tested on the sys fan header to see if it was the fan or mobo. Can still didn’t work. I tried another fan on the same spot and it worked. 

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