Why?
Because you with the layout of the AM-X motherboards can only install many Tower cooler so you blow up or down ...
If the top is a power supply that is still (The PSU sucks the heat from the CPU cooler and blows it out)
However, in this case the power supply is down and up Unfortunately there are no fans openings.
So you have the choice between heat build up or graphics cards heating down.
The search for freely rotating tower coolers is more difficult than the same to buy a case in my opinion with
Openings upwards. (I then ordered me to Sharkoon Tauron and am satisfied with this.)