Load default settings, then make sure fans are in Auto mode. I noticed that the fan by the display connectors always runs but the other two kick in as needed. At first I thought there is an issue with the fans but I kicked all 3 fans to 100% manually (to test that the fans themselves are working) and everything was fine. When GPU utilization is at 100% all 3 are working in auto mode.
 
BTW, what temps are you getting on the GPU, memory, etc.? 
 

i installed a hybrid cooler on mine and x1 would only control the one on the radiator and not the one on the card. i uninstalled and went to afterburner and restarted and now the fan runs all the time and i cant control it at all. but atleast it runs i guess.

Figured this out, if you scroll to the fan curve page you have to make sure that the “Enable Automatic Control” box is checked otherwise your first fan will stay at 20% and all other fans will remain at zero at all time even when the fans are set to automatic on that first page.

I don’t know why EVGA made it so you have to set fans to automatic on two pages for it to work. It is really bad design so why it is still not fixed a year later is beyond me. Hopefully this helps others though.

Yeah, I'm not sure what's going on. I think I'll have to reinstall to see if that fixes it. No matter what I do, the first fan stays on 20%

Critical Delay

Techmonstaa
While the computer is off, check your vBios switch (the little switch next to the 8 pin power connectors on your card) if the switch is facing your power connectors, push it to the other side on your card to face the display connectors (backside of your PC) When you turn your pc back on, all should be well. You're more than likely on the higher setting which locks the lowest fan speed to 20% on fan 1 and does not allow it to shut off. I ran into the same issue and found the answer on another post. I totally forgot I changed the vBios switch lol. Credit goes to EVGA forum member vengeancewithin

I just noticed that fan 1 on my 2080ti ft3 is also at 20%. Is the VBios switch the same as the switch that lets you go into OC mode? I turned that on about a week ago and just now my 1st fan wont go lower than 20%.

The GPU has two Bios that you can toggle between using the OC Switch. If your switch is set to OC mode then it is by design that the first fan is programmed to never go below 20%. The reason for that is because this Bios is to be used for by users when overclocking and it is a safeguard implemented to ensure safe temperatures. If you wish this fan to go below 20% or turn off at low temperature or when the card is idle then you should use the Non-OC bios.
 
The problem I had highlighted was that the other two fans on card would not turn on AT ALL when "FAN SPEED" on the first first tab of PX1 was set to "AUTO" as noted when the auto were highlighted in blue. It wasn't until you scrolled two tabs to the right on the Fan control screen and checked the "Fan Curve Control" box that the other fans would actually turn on and set fan speed automatically depending on temperature.
 
 

Rlentini3
My GTX 2080 Super graphics card fans aren't spinning while computer is on without a load.  Is that normal?
 
I downloaded PX1, and went to the Fan Curve Control box and setting a curve, was able to turn fans on at lower temps.  However, when I exit the PX1 application, the fans turn back off.  It looks like the settings for fan speed only apply when the app is running.  When I reload the app, the fans start up again.  Is that standard operating procedure... that I have to leave the app loaded and running for the settings to apply?

Yes, it is normal and you still need to run PX1 in the background for your manually set fan curves to work.  Also, make sure to save the profile so you don't have to do that all over again.