Does PSS really cause stutters/microstutters? What does it even do?

[benjji1]

I've read that PSS could cause stutters/microstutters in systems. how legitimate is this? currently its on auto, and in some games i do get stutters, but not all. Which i chalked upto just the games affected by stutters just being unoptimized or poorly optimized. (BL3 and FIVEM i can think of straight away) Instead of it being PSS, as shouldnt it affect all games and cause stutters?
I do recall previously turning this setting off and seeing a rise in idle temperature in comparison. Thats cause of PSS right? as i understand it, turning it on allows for clock speed to go lower and thus lower idle/average temps right? Just asking that since temps during summer are reaching 90c pretty fast under full load, so i dont want to be accidentally increasing the temperature by turning PSS off.

Thanks for any replies and sorry for kinda shoehorning the temperature question in there, i didnt really know how to phrase it and didnt want to make an entirely separate post about pretty much the same topic.
Heres the pc specs just incase they are needed:
5800x3d
B450 tomahawk max
rm850e
3090
32gb ddr4 3600 mhz ram