Question Case fans set up

[alex.stoychev]

So hello guys, yesterday i saw in my bios that i have a fan options: PWM, DC, Auto(currently) and a Smart Fan Mode. I have two Arctic F14 PWM PST for intake and stock fan of Q300l case in the back. My question is, should i turn on smart fan mode and check the box on PWM or leave it on how its now.
PC spec.
R5 2600
GTX 1660ti
B450 v2 bazooka mobo

 

[Traditore]

Leave Auto unless you feel the need to adjust fans speed (make them quieter, or make PC cooler).