Cpu fan stopping

[Glennstefani]

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.   

 

Thanks. 

[Fasauceome]

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

[TempestCatto]

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.

[Glennstefani]

Thanks alot for the fast replies.