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How many exhaust and intake fans should I put in my casing ?

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Oh wow, if it's not too late send that case back and buy something less awful.

Trying to fix that case with more fans is not a good solution. Just get any other case that isn't a complete cooling disaster.
 
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Hi,
Shouldn't need any exhaust fans except maybe the top rear if you must.
All intake all air is forced out.
 
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A 1 or 2 fan case doesnt need top exhaust fans, because...( wait for it!)....heat rises! :p

Heat does not just rise it spreads out in every direction. Hot air rises (and does so slowly) because cooler air is denser and when faced with a fan, hot air will go in any direction you send it.
 
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At least the i3-4160 is not a power beast that wants 200watt, I even have something simular cooled by Noctua NH-L9i in my XP gaming rig.

I really have you are going with a alright air cooler that can make some flow in the case not just cool the cpu but also ram and vrm.
 
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