Overlapping Case Fans?

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Anch
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Hello Sir Rodney. I would like to ask a question.

Well, I'm obsessed on Case cooling and I want to increase more air intake on my case.
I only have 1 slot for an intake fan, and the option is either 80mm or 120mm.

My set-up for the intake fan now is the 80mm fan is mounted at the front part of the mount and the 120mm is mounted right behind the 80mm fan.

Here's an illustration:

My question is, will this set-up improve air intake? or will there be conflicts or something? Just wanted my PC to have more intake because I've been using my PC for 18 hours (most of the time) downloading quite big files.

Would greatly appreciate your answer, Thanks!! =D

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dustyschaffner
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not exactly, by experience, mixing different sized fans causes more obstacles than good

outburn91
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It really wouldn't do anything. The 80mm fan has a maximum intake and if the 120 is directly on the 80, then its maximum input would be the 80's output. Even then though, the 120 can only push so much air. So even if it was being supplied with limitless air from the 80, it can only push out what it's rated to do so. Basically, whichever fan has the higher output, that will be what you get, unless the 120 hinders the 80 in some way.

Anch
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Ahh, I see. Well then, i guess i'll remove the 80mm fan then. Thank you dustyschaffner and outburn21!

Oh, one more question. How about 2 80mm fans or 2 120mm fans overlapping? Both are exactly the same brand. Would that increase air intake? Thanks again!!

outburn91
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It will still work the same as I explained above. The last 120mm/80mm can still only push as much air as it's rated to do so no matter what kind of air is being pushed into it. Again, whichever fan is pushing the most air will be the maximum that you will get out of the two together, though, it probably will be less than a 80/120mm standalone fan.

Anch
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Ahh ok!! Thanks for all the help dude!!