GPU Fan Too Loud for no Reason

HeavyAssault

Reputable
Nov 19, 2015
2
0
4,520
I have 2 gtx 970's. Not in Sli as of yet (waiting on cable to come in mail)
One of the gpus gets very loud for no reason, no game playing, temps are around 35 and it just starts going at 100%, then it will go down and 5 mins later back up there.
I don't understand what could be the reason. When i look at open hardware monitor, the second gpu has a fan of 0 rpm but i know its blowing at 100% speed.
What is the reason???