Top intake/exhaust delima

[Grannygaming]

I know this has been threaded before and debated in other places. I am building a gaming computer currently for someone. Its got one spot for a 120mm fan in the front, two spots for 120mm fan on top (or radiator), and one rear spot for a 120mm fan. Case is a Raijintek Arcadia if anyone needs a visual. I've got four fans ~55 CFM each fan. I feel like if both top and back are exhausting that will create negative pressure since they are all 120mm which will cause dust whether there are dust covers or not (which there are in this build). How do I create positive pressure in this case with the allotted fans? Is it possible to intake rear and front while exhausting top? Intake front and top and exhaust rear? Thanks!


*I don't believe these fans aren't strong enough to intake only one fan in the front and not create negative pressure. I'd rather cut a fan or two out if needed.

 

[Kenton82]

Creating positive pressure is a reverse of what you have - more intake than exhaust. You can also get a separate fan controller if you need to fine-tune your cooling efficiency further.
I wouldn't have the top as an intake, because hot air rises and this will centre the airflow and try to force it in different directions.
This case seems to be erring on the side of negative pressure, as you say the 120mm fans are not huge.

Can this case support another fan above the front one? I have had a look online, and i can't tell.