ThxWith 140 mm radiators.... i would say +20W for each step at the list above.
Hello Eddy,It always depends on how high the noise can be. For example, a 120mm ST30 radiator can handle up to 300W with a 4000rpm fan.
But there is a simple rule you can follow
80W TDP per 120mm radiator space with 600rpm fans
100W TDP per 120mm radiator space with 800rpm fans
120W TDP per 120mm radiator space with 1000rpm fans
150W TDP per 120mm radiator space with 1500rpm fans
180W TDP per 120mm radiator space with 2000rpm fans
This is only a rough guideline as there are a few other things to consider, such as the temperature of the ambient air or the air that the fans suck in.