Case fans and pressure

[RossTheGuy]

Got my new build finished today and the case which I am using S340 came with 2 fans.
I had an extra fan in my old case so I put it in the new one.
Right now I have 1 intake fan which "feeds" my gpu and cpu with fresh air while 2 are pushing the air out of the case.
I am curious about l the air pressure kinds and which is the best for your pc and also the fan sizes.
I am using 3 120mm fans I think and should I consider getting 2 140mm fans for air intake or am I good?
Right now I have 3 fans and wondering if I should get a second intake fan and which size.

 

[mcnumpty23]

to be honest sometimes people over think it--what fans,or static pressure or not.positive air flow or not etc

if you are happy with your temperatures

then you are good to go

 

[Chugalug_]

Just so long as you have one intake one exhaust you're perfectly fine.
The S340's stock setup is good as is.