Question New build PC fans won't turn off after Windows shutdown

Aug 19, 2021
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Hi everyone,

Built a new case yesterday. I had a problem with dual ram sticks not working. With single ram everything worked fine including shutdown. I fixed that by taking out and reinserting the CPU.

Reinstalled Windows 10 pro, now when I shut down Windows, display, keyboard and mouse turns off but fans keep working until I press the power button on the case.

I must have messed something up, can't figure out what. Any ideas would be appreciated.

Thing I tried:
  • Turned off "quick startup" in Power settings
  • turned off hibernation
  • Reinserted all PSU cables
  • bios was already updated to support the CPU
  • tried shutting down with cmd line
Specs:
Msi mpg b550 gaming edge wifi motherboard
amd ryzen 5900x
msi suprim x rtx 3070
g.skill ripjaws v 3200 32 gb ram (16x2)
Samsung evo 970 ssd
coolermaster ml360r cooler
thermaltake gf1 psu 750w
masterbox td500 mesh case
 
Aug 19, 2021
3
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10
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Tried resetting CMOS by inserting a screwdriver into a motherboard pin.
Also ran windows repair tools from command promt.
Still no luck.
 

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