the passive psus aren't meant to be mounted in that position, they are supposed to vent heat out the top so i would advise against using it for this case
i, and going by asrocks forum a lot of other users have also had issues with the wifi card where it would suddenly stop responding, changing it out with an intel card fixed the issue
a good air cooler will be just as effective with less points of failure and with no motor noise from the pump. you should really only use an AIO if you need to move the radiator away from the motherboard and on to the case somewhere with the, admittedly sometime not so small, added benefit of...