Case Pressure Optimization

[PhysicalVocalist]

Sup nerds,

So I'm planning on upgrading from my tower cooler to an AIO liquid cooler sometime soon and I think I just found my target.  The Swiftech H320 x2.   The only issue?  My case front only supports up to 280mm of fans for intake so I'd need to mount this bad boy as exhaust on the top of my case.  What I'm worried about though is whether or not these 3 fans as exhaust will overpower the two 140mm intake fans I have in the front and cause me to end up with negative pressure in my case.  I know that they'll lose efficacy as they'll be pulling air through the radiator, not to mention they're probably static-pressure-optimized as opposed to airflow optimized, but I am still new to PC building and this will be my first step into the liquid cooling pool.  Does anybody have any experience either with this AIO or with fussing over case pressure?  I'd rather have positive over negative just because I'm generally lazy about cleaning dust and don't want to have to clean it out fairly often.  

Thanks in advance!

[PhysicalVocalist]

Bump??

[Mick Naughty]

Run the 140's faster then the 120's. Only real fix for that. 

[PhysicalVocalist]

Makes sense, here's the thing though...

Do I need a fan controller to do that?  I honestly haven't found a reliable way to control my case fans yet and I'm not sure if the solution is hardware or software.

[atomicus]

What speed are they running at currently, and what fans are they? You should be able to control fan speed from BIOS.

[PhysicalVocalist]

They're just a couple of Phanteks case fans that came with my case, and I don't recall how fast they're running off the top of my head.  I'll check again when I get back from work.  But if I can control them from the BIOS, that would make my life quite a bit easier.

[Mick Naughty]

If they are pwm  your board has software so you can set them up in windows to do what ever you want. 

[PhysicalVocalist]

I don't think they are pwm fans, the cables are only 3 pin connectors.  I do plan on getting new case fans anyway at some point so that's probably the final solution in the end.

[Mick Naughty]

1 hour ago, PhysicalVocalist said:

I don't think they are pwm fans, the cables are only 3 pin connectors.  I do plan on getting new case fans anyway at some point so that's probably the final solution in the end.

Even 3 pin can be controlled. Get the software for the mobo. Ensure the fans are plugged into the correct headers in case that mobo is fancy. Then adjust them. 

[PhysicalVocalist]

Oh chill, thanks man.  I'll check Gigabyte's website when I get home from work and see if there's something useful there.