help with fan config pls?

[dan_s98]

Hey guys, I just moved my pc into the CM mastercase 3 pro and I'm agonizing over the fan config, I want positive case pressure to keep dust away but the only way I can think of is dual intake at the front, dual exhaust at the top and intake at the rear. My question is, will the intake at the front conflict with the intake at the rear and mess up the airflow? Should I just leave the rear fan as exhaust and whatever? I could also do rear intake, top dual intake and front dual exhaust but I don't like being bombarded with heat, and my 120mm cpu rad is in the front and I'd like that to be an intake for lower cpu temps. Thanks in advance!

 

EDIT: I'm going for all low rpm fans except for the rad ones for as little noise as possible, also one of the fan slots at the front is half blocked by the power supply basement.

[martward]

I don't think having an intake underneath the exhaust makes a lot of sense, since you usually try to make a flow through the case (usually from the front to the back). If you really want a positive pressure than you should just drop one of the exhausts I guess.

[LogicalDrm]

Only intake and exhaust will fight. Thats why its not really good to have them close to each other. Having two intakes oppisite sides of case don't have any effect on each other. Since you plan to use all fans at minimum speeds, air will almost stop moving few cm to fan. Look at the smoke demos and you see how much fans have directional effect at full speed.