New CPU fan really loud at start up

DL-zz

Reputable
Jan 6, 2016
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4,510
I just built my first computer. Every part of it is new. However, everytime i start up my computer the CPU fan makes a really loud noise and then gets quieter after about 1 second. I opened my case and saw the fan was going really fast at start up and slows down afterwards.
I have a i5-4690 cpu
Z97s motherboard
and 750w psu

Can someone please help me figure out what the problem is?
 

DL-zz

Reputable
Jan 6, 2016
6
0
4,510


thanks for answering so quickly =)
Now i have nothing to worry about