Need help setting up fans

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trausti

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Jul 13, 2012
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Hello, I'm building a new computer in the Phanteks Evolv ATX, I'm going for the i7 6700k cpu with a h100i top mounted preferably, I want positive pressure for as little dust as possible but I have pretty much no clue on how to get it done... I'm thinking the radiator and back would serve as exhaust and have 3x120 as intake in front but can that possibly add up to positive pressure?
Any advice would be nice :)
 
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Three 120mm fans will give you positive pressure in your chassis. You need to be aware that the radiator on the AiO cooler will slow down the airflow from the fans mounted to it... So you will have one 120mm fan on the rear and two 120mm fans on the top mounted radiator, then three 120mm fans as intake, and you've got positive pressure.
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TbsToy

TbsToy

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Oct 19, 2015
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You are on the right track. Can you fit 140 mm fans as intakes on the front? If not the 120s will work. Have the fronts running a little faster than the top and backs. Positive pressure directed airflow.
W.P.
 
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weberdarren97

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Aug 10, 2015
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Three 120mm fans will give you positive pressure in your chassis. You need to be aware that the radiator on the AiO cooler will slow down the airflow from the fans mounted to it... So you will have one 120mm fan on the rear and two 120mm fans on the top mounted radiator, then three 120mm fans as intake, and you've got positive pressure.
 
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trausti

Honorable
Jul 13, 2012
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10,510
It would be a 140mm fan at the rear, so 1x140mm AF Corsair and 2x120mm SP Corsair on the radiator for exhaust and either 2x140mm or 3x120mm AF Corsair fans for intake would amount to positive pressure?
 
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weberdarren97

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Aug 10, 2015
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Actually there's an advantage to using a 120mm on the rear. You see, you'll have enough airflow either way and increasing airflow above the level of cooling needed will not yield a performance increase. If you get a 140mm, you'll be wasting money because you'll have more airflow than you need so you won't notice a cooling increase over a 120mm. Since Corsair sells their AF 120s in pairs, it would be very cost effective to just get two packs of those.
 
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MR B0CEPHUS

MR B0CEPHUS

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Feb 26, 2016
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I agree. I have two 140 mm on the front of my Define R4. Trying to get that positive airflow. You're going to get dust either way, though. I promise you. Get used to cleaning it and doing your best in keeping it clean regardless of airflow.
 
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weberdarren97

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Aug 10, 2015
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I have 1x200mm 1x140mm and 2x120mm as intake and 2x200mm and 1x120mm (on radiator) as exhaust in my NZXT Phantom 530. I need the extra airflow because I have two R9 280X's that I overclocked to 1100MHz and I also need to keep all of my other stuff cool like the VRMs on the motherboard since I have the CPU (AMD FX 8350, 4GHz 4.2GHz Turbo) overclocked to 5.2GHz. I open my chassis every three months or so and there is hardly any dust anywhere inside except for on top of the primary video card, and even that is minimal amount.
 
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MR B0CEPHUS

MR B0CEPHUS

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Feb 26, 2016
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Same here. I get some on the top of my GTX 980 ti and a little on the fans. Not much but it's still dust in there. The positive pressure and filters help a lot, but I still get in there and clean. I open it up more often, though. Maybe because it's my first build and I don't want anything to happen to it. Thanks to online videos and this forum I put it together this year not knowing anything about PCs!
 
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weberdarren97

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Aug 10, 2015
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Now this may sound stupid, but it actually works... If you remove the intake filters so that the fans can breathe easier, you'll end up with a higher internal pressure and there will actually be less dust than if you had the filters on. However, if you mount any fans to the bottom sucking air in from the floor, leave those filters on because they will block out the carpet dust.
 
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MR B0CEPHUS

MR B0CEPHUS

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Feb 26, 2016
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I closed that bottom, even though there's a filter. I believe the power supply fan sucks up air from the bottom, though. I'll give that a shot for a few months and see what happens.
 
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