I've been monitoring temps and adjusting fan curves for chassis, CPU and GPU.  Had just completed a test and adjusted the chassis fan curves.  After letting temps go back to idle I started another test (I run Osiris New Dawn to crank the GPU for several minutes).  But I aborted this test when the GPU got to 70C and NEITHER of the two card fans were spinning.
 
The GPU is at 45C (Power at 43C) as I type this. The fan curves I have should have both fans running about 55% max RPM but there is NOTHING!  I've noticed this the last couple days that the GPU fans won't spin at all and suddenly start up well "up the curve".
 
The card is less than a week in use.
 
Any ideas about this behavior?
 
ASUS ROG STRIX GAMING-G
8700K
C24 Celsius
EVGA GTX 1080 FTW2
Corsair RM 650X
Fractal Design Mini C

Thanks for the ideas to check.  Everything physically is fine.  I'm using PXOC.  Fan curve is "custom" and had worked fine just a few hours ago.
 
I did find my issue eventually.  I remember clicking on APPLY (the button in bottom right around the PXOC circle GUI).  I figured that caused some setting I didn't want.  I decided I could return to what I had so I clicked DEFAULT (botton at bottom left of the circle GUI) to reset whatever APPLY had messed with.  That was it.  Resetting to the default brought everything back as it had been. 
 
Now, if only everything would work without having to have PXOC running.  Oh well.  The price one pays for cool running systems I guess.

Thanks again.  I just booted up (after shutdown and lunch) and the fan curves are no longer being followed.  Manually setting the fan speeds works OK but that defeats the purpose of fan control.  I'll uninstall, cleanup and install again.  See what comes next.

Crazy.. hope it's just software issue.

Is there a bios switch on the card? If so are you using master or slave?

I dont see why the bios would override pxoc though. :/

Hopefully msi afterburner shows something different with the fabs.. is so maybe the registry setting for pxoc are sticking around in windows and are not updating. Which would mean you would have to run regedit and search for ea evga item and delete till all gone to remove any old settings.

Moving thread to evga software subsection.

Thanks for the move, sajin.
 
So it must be that I can't get the fans to turn color.  When I click on them nothing happens.  I'll keep trying.
 
MSI Afterburner is working as expected.
 
Thanks for all the help guys.

It appears I hadn't clicked the fan icons to make them blue.  PXOC is working the last I checked.

Same problem. If program is switched off after start-up, the fans stop working!
 
I'm worried about the dependence of the turns on the program, what if it does not work? Can I integrate in the BIOS the parameters of the cooler that I need?
 
Those that are on the default - are small and I prefer speed higher and lower temperature.

You can lay out the corrected slave bios? I need a simple algorithm.
 

 
EVGA GeForce GTX 1080 FTW2 (new 11GHz version)