I have a EVGA 980 GTX and a EVGA 1080 Ti and both have the fan speed bar to the max. Even the all the 3 fans for the 1080 Ti.
I have work running on both GPUs and one is getting hot (980 GTX). Which is to be expected. Speed is at 100% at 4200 RPM, but when my GPU reaches 92c the RPMs go to 6200 RPM.
Why can't I keep it at 6200 RPM?
The saying should be that "The cooler the longer the lifespan or longevity".  Also, I don't like to hear the fan speed up and slow down every 30 sec on manual 100% fan speed.
 
Also, I seen this happen on my 1080 Ti as well but right now because it's not reaching that 92 temp right now because it's not running the same work that can make any GPU run hot. But when it does my 1080 Ti does the same when at 100% fan speed which is all 3 fans around 3200 RPMs will go faster than that when getting to that temp. I assume it's 92c as well.
 
Running Prime Gride 'Do You Fell Lucky?' for GPUs from BOINC will make any GPU run HOT.
 
Precision X1 v1.2.2
 
Note: I had 2 EVGA GPUs that you could only max out at 80% of the RPMs because Precision said so and waited for a GPU BIOS update to go to 100%. Is that happing to these GPUs too?
And NOW Precision X1 says it's at 100% but when it hits 92c it goes 2000 RPMs more.
 
P.S. I cannot upload any images because when selecting "From Gallery / Upload" is blank only showing "Select from an option below:". Using Edge.

Sandman74blue
I have a EVGA 980 GTX and a EVGA 1080 Ti and both have the fan speed bar to the max. Even the all the 3 fans for the 1080 Ti.
I have work running on both GPUs and one is getting hot (980 GTX). Which is to be expected. Speed is at 100% at 4200 RPM, but when my GPU reaches 92c the RPMs go to 6200 RPM.
Why can't I keep it at 6200 RPM?
The saying should be that "The cooler the longer the lifespan or longevity".  Also, I don't like to hear the fan speed up and slow down every 30 sec on manual 100% fan speed.
 
Also, I seen this happen on my 1080 Ti as well but right now because it's not reaching that 92 temp right now because it's not running the same work that can make any GPU run hot. But when it does my 1080 Ti does the same when at 100% fan speed which is all 3 fans around 3200 RPMs will go faster than that when getting to that temp. I assume it's 92c as well.
 
Running Prime Gride 'Do You Fell Lucky?' for GPUs from BOINC will make any GPU run HOT.
 
Precision X1 v1.2.2
 
Note: I had 2 EVGA GPUs that you could only max out at 80% of the RPMs because Precision said so and waited for a GPU BIOS update to go to 100%. Is that happing to these GPUs too?
And NOW Precision X1 says it's at 100% but when it hits 92c it goes 2000 RPMs more.
 
P.S. I cannot upload any images because when selecting "From Gallery / Upload" is blank only showing "Select from an option below:". Using Edge.

Yes that is correct. As far as I am aware, they all limit manual control of fan speed to 80% of the rated 100% speed. In other words, 100% fan speed in Precision or Afterburner is actually ~80% of the rated fan speed. The GPU over temp protection overrides this at ~92C to send +12v to the fan to run at full speed.  If you don't like to hear the fan noise, you need a better cooling solution for the GPU's.

I have to imagine that you have already repasted the GPU recently, right? I hope.