60 to 120? Generally there are tell tale signs. If I quickly drag a window around it’s clear as day at 120.

Most people who’ve used both 60 and 120 could tell, definitely if a game is running. Unless you’re asking me to distinguish between like 110 and 120, but that’s like asking someone to distinguish between roughly 30 and 32.

North of 120 it gets trickier to notice no matter what IMO.

I can live with 60 but 85+ is where I’m happy.