Hello.
So not long ago one of my gtx 1080 died so under warranty got it replaced but since then my PC fans acts strange.By increasing speeds up and down.
Also witch Speccy under full load it shows that my motherboard reaches 80C.
Moterboard Z170-HD3P-CF.
Checked the heat sing and its holds still in its place.But as i noticed my motherboard temp is increasing becouse of CPU.When I used Furmark stress test for 30mins my motherboard did not reach over 45C ....When I used Prime 95 for PC my cpu reached around 73C while motherboard was at 84C.
What CPU & cooler are you running?
Which tests are you running in P95? If you're running blend, it's normal for the fan speeds to change periodically, as the different tests put different loads on your CPU. If you're running Small FFTs, I would expect fan speeds to ramp up & stay there unless there's thermal throttling.
I'm assuming this is overclocked. What is your VCore during P95?
Does is start doing this within a few minutes of starting P95, or does it run fine for a while before the fans speeds start cycling?
I had this happen on my system during P95 SFFT when I tried to run 4.7GHz at 1.37VCore. It took about 30 minutes before it started. My fans would cycle between max & idle speeds, along with the actual load on the CPU. HWiNFO64 also reported PROCHOT YES. As I don't believe the processor itself is supposed to throttle below 90C, I suspect that my VRMs were overheating. I don't have that issue at 4.6GHz 1.32V.
Runing on stock cooler atm (ran out of cash)
Runing on stock speeds as well.
On prime95 I did run blend test.
But even before my GPU died CPU never reached over 62C on full load.
Also might add that one PSU died in the PC as well but took to warranty they fixed all ...starting to think that mybe they forgot to fix somthing.
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