Shutting down your PC instead of restarting after switching the VBIOS
might be an issue if Windows "Fast Startup" is on..You can turn it off and see.
I think that with no software (Precision/Afterburner) running/intervening and the VBIOS switch in the Normal position, the GPU fan (left) should run only when GPU temp reaches 60C+ and be off below 60C..The Power and Memory fans should only run when their temps reach 60C and be off below 60C no matter the VBIOS switch position.
ACX 2.0/ACX 3.0 have fan on/off temps of 65C but I think they changed that to 60C with the iCX cards like yours.
If you have questions about it you can always
Contact EVGA Customer Service..They can provide you with a Normal and/or OC VBIOS.exe if necessary.