It's highly game dependent though, a game like CSGO or LOL or even Valorant isn't going to tax the cpu too hard, even with the cpu settings at ultra and game settings having all the floating damage and bloom enabled. Games like the Civ series, heavily nodded skyrim or fallout with enb, MSFS around London or LA etc are a different story. That's when you'll start seeing more than 6-8 cores used and higher usage.
Most asetek vendor rads are easy. 120mm =140w, 240mm=250w, 280mm=300w, 360mm=350w, 420mm=400w. There will be some oddballs, like the original Enermax 240mm liquidtech that hit 300w, but that wasn't an asetek design pump or rad. Same applies to the Corsair's using the square body Coolit pumps, the rads are the same as what asetek vendors use.
It's only for the most part in custom loop rads that wattage differs from the aios, it'll also depend on the rad thickness, rad in/out pipe design, fin type, fin per inch etc.
But that's capacity only, actual temps in that capacity are solely due to the fans used and the performance of those fans vs rad. Using the wrong rad or wrong fans can easily result in 10°C temp loss or more.