case fan help

[TexasGaint]

So with a air 540 case it has 3 140mm sp fans with it. two on the front and one on the back, if i add a h105 with two more fans with all four of those fans and radatior on the top, how would i go about facing the fans a certain way and how should i go with the raiator with a push pull or what?

[Shaqo_Wyn]

So with a air 540 case it has 3 140mm sp fans with it. two on the front and one on the back, if i add a h105 with two more fans with all four of those fans and radatior on the top, how would i go about facing the fans a certain way and how should i go with the raiator with a push pull or what?

Front intake, top exhaust in pull on the rad and rear exhaust.

[TexasGaint]

ok, im changing the fans to 120mm kuda fans, three on the front for intake and the radiatior on top with a pull with air going out and I am not sure if i want to put that rear fan though because i want a positive air flow. any ideas?

^^^^^^^^

Front intake, top exhaust in pull on the rad and rear exhaust.

[LogicalDrm]

It doesn't matter that much between having 3-in, 2-out or 3-in, 3-out.

[TexasGaint]

Then what is linus talking about when he says having a positive air flow is better then nutral or more exost then input

^^^^^^^^

[LogicalDrm]

Then what is linus talking about when he says having a positive air flow is better then nutral or more exost then input

 

It is better. But you won't notice it. 1 fan doesn't make that much difference. Its more about when difference is 2 or more fans. In terms of temps, difference is literally 1-2C. In terms of dust, well it depends on so many things.

[TexasGaint]

It is better. But you won't notice it. 1 fan doesn't make that much difference. Its more about when difference is 2 or more fans. In terms of temps, difference is literally 1-2C. In terms of dust, well it depends on so many things.

So having three intake and three out take is fine?

[LogicalDrm]

So having three intake and three out take is fine?

 

Yeah. You can easily try what effect different configs have by just disconnecting fan cables.

[Shaqo_Wyn]

ok, im changing the fans to 120mm kuda fans, three on the front for intake and the radiatior on top with a pull with air going out and I am not sure if i want to put that rear fan though because i want a positive air flow. any ideas?

CFM totals are what matter when going for positive or negative airflow. Three intakes and three exhausts with fans of the same CFM would mean neutral airflow which is fine. If you really want positive airflow, you could get exhaust fans with slightly lower CFM, another option would be to run the exhaust fans a bit slower than the intakes or to skip the exhaust fan like you said. 

[TexasGaint]

Yeah. You can easily try what effect different configs have by just disconnecting fan cables.

 

CFM totals are what matter when going for positive or negative airflow. Three intakes and three exhausts with fans of the same CFM would mean neutral airflow which is fine. If you really want positive airflow, you could get exhaust fans with slightly lower CFM, another option would be to run the exhaust fans a bit slower than the intakes or to skip the exhaust fan like you said. 

Thank yall so much!!!