I was wondering how many fans you need in a case to keep a good airflow and where you would have to put those fans.
My case is: Fractal Design Define R5
the R5 comes without dustfilters top
I'd leave one as front intake and install the other one as bottom intake.
both locations have good build-in dust filters
you need atleast three case fans to have a good airflow. in your define R5 case you should put the 140mm fan at the rear as exhaust put two 140mm fans on the top as intake.
With the intake fans on top, does that mean that it would be best to put the pc on my desk not under it. Or does it not make a difference?
the R5 comes without dustfilters top
I'd leave one as front intake and install the other one as bottom intake.
both locations have good build-in dust filters