cpu fan goes up and down

hadi suliman

Distinguished
Dec 21, 2011
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is that normal for cpu fan to go high rpm for few seconds and then go down again ? and that happened in load not idle i am using zbrush its a 3d software when i move the object especially the heavy one with 1 or 2 million polygons !! when i move it i hear the fan going high if i let go the object the fan is going down again is that normal ? no over heat for the cores they are Fluctuating around 40 to 60 in load
my specs
core i5 6400 2.7ghz
gtx 1050 ti
psu 500w
8 gig of ram
 

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