Originally Posted by
Calmatory
Next time try to respond to the arguments please, and don't "go around the point".
If you understood the basics of thermal physics and thermodynamics, you would understand that flowing warm air is better than cool still standing air around components, as long as the air is cooler than the components. Leafblower design delivers absolutely no airflow to the rest of the case, while open cooler provides airflow all around the case, depending on the orientation of the cooler.
It is far more important to have more airflow than cooler air for passive components like VRM, RAM, SB and NB. Thus put, open cooler isn't only more efficient at cooling, but in most cases can also provide additional cooling to other components too. Though, it is true that because of higher ambient temperature in the case, actively cooled components will most probably see higher temperatures by a few degrees. However, in practice it has no difference in OC-ability.