Best negative air pressure setup.

[DayQuil_Man]

OK, so i have been doing lots of research towards my first build these upcoming months but I'm stuck on one thing, air pressure.
The case I will be using for my build is a cooler master master-case pro 5 and after doing lots of research I have come to the conclusion that negative pressure is the way to go since more people prefer it. My case has support for either 3 or 4 140mm fans in the front. 2 140mm fans at the top and 1 140mm fan in the rear.
My question is, what is the best fan setup for a negative air pressure configuration?
Since I need to have more exhaust than intake.
BTW I will be using a Noctua NH-D15 CPU cooler which has 2 fans blowing towards the rear exhaust fan.
Or if you prefer a different air pressure setup please leave your suggestions, maybe such as 3 front intake and 3 top and 1 rear as exhaust?

Here is a link to my parts: http://pcpartpicker.com/p/bj9YsY
Thanks

 

[TbsToy]

Why do you think negative case pressure is better than positive airflow?
Walt prill

 

[arossetti]

Here's a link to Linus Tech Tips:

https://www.youtube.com/watch?v=8OmkmluAYAQ

It's not specifically about negative fan pressure but does provide some insight into the number of fans needed and how their placement affects case temps.

 

[atheus]

I find your conclusion a bit puzzling, as negative pressure seems to be something you would avoid when possible. With positive case pressure you are controlling where all the air that enters your case comes from - the front. With negative pressure, air will get sucked into the case from wherever there is a gap, including the back and sides where hot air from your exhaust fans resides. Furthermore, you lose the ability to filter the majority of the air entering your case, simplifying dust management.

So the obvious config is either 3 intakes in the front, 2 exhaust in the back/top, or 4 intakes in the front, 3 exhaust in the back/top.

If you're trying to force the case to use negative pressure while still having a good air flow pattern, you'll be forced to use only 2 intakes in the front with 3 exhaust in the back. That would be quite weird.

 

[rar_54]

Air flow should be laminar, smooth and straight, from the front of the case to the rear. The front fans should blow in and the back fans should blow out, straight through the case. This is the design you see on all enterprise class servers, switches and routers.

 

[DayQuil_Man]

I've decided to go with positive air pressure.
3 intake at the front and 1 exhaust in the rear causing the hot air to leave through the rear and empty top vents.