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Cpu fan stopping

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Posted · Original PosterOP

Hi.  I just upgraded my cpu from the ryzen 2700x to the 3900x.

 I plugged everything in, and I also upgraded my psu to a corsair RM 750x. 


I didn't have time to finish everything, but I started it up without a monitor and I noticed that the rgb fan lit up and started spinning. But then it would stop spinning every now and then. 


I know I should wait until I can start it with the monitor plugged in, but I got worried if there could be any issues. 


I did some Google searches and I read people talking about everything from psu to motherboard issues.  Which got my worried. 


So if anyone could enlighten me I would be greatful.   



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This is normal behavior as far as I've experienced on a handful of Ryzen builds. 

I WILL find your ITX build thread, and I WILL recommend the SIlverstone Sugo SG13B


Primary PC:

i7 8086k (won) - EVGA Z370 Classified K - G.Kill Trident Z RGB - Force MP500 - Jedi Order Titan Xp - The venerated Hyper 212 Evo (with RGB Riing flair) - EVGA G2 650W - Black and green theme, Razer branwashed me.

Draws 400 watts under max load, for reference.


Linux Proliant ML150 G6:

Dual Xeon X5560 - 24GB ECC DDR3 - GTX 750 TI - old Seagate 1.5TB HDD - Dark moded Ubuntu (and Win7, cuz why not)


EVGA G3 thread, BR/BT threadSeasonic Focus thread, S12II/M12II thread, Userbenchmark (Et al.) is trash explained, PSU misconceptions

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Sounds like the cpu fan curve is set to have the fan turn off if the cpu is below a certain temp. I wouldnt worry about it. Just monitor temps for a few days during normal use.

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