u/Connect_Selection_77

I have an SKR Mini E3 v3 board and am curious to know if it's better to have the controller fan blowing onto the board from the top (Ender 3 controller case) or would it be better to have it exhaust out the top where it is pulling cooler air in from the lower vent openings? Currently, I have it set up as normal for an Ender 3.