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Old 13-08-14, 06:47 PM
RamboOC RamboOC is offline
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Intake vs Exhaust configuration

I had a discussion with MaddenShadow about which is better - more intake fans or more exhaust fans. He says that
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Originally Posted by MaddenShadow View Post
What!? Since when is negative airpressure good? There should be more intake than exaust, so dust is passivly blown out. Is it you or am I missing something here?
and
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Originally Posted by MaddenShadow View Post
Ive always heard more intake, lets see what others have to say


In my opinion from what i read multiple times before, exhaust is more important so that heat is removed. (keep in mind i read mostly about setups using air cooling)

For example in my opinion its better to have 3 fans as exhaust and 1 front fan as intake, where as MaddenShadow thinks its better to have it the other way round

If I only had 1 case fan, and i had a choice to use it as intake at the front or exhaust at the back, i would choose to run it as exhaust

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Old 13-08-14, 06:57 PM
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But seriously, I have had an old Haf 922 and had 3x 120 and 1x 200mm intake(unfiltered) and 1x 120 exhaust so more in than out and I had massive dust Problems so I turned it around and voila!
Still problems... it sucked in dust from EVERYWHERE where it was possible, especially those 5.25 bays.
Best is neutral for example 2x 120 in and 2x 120 out.
But when filtered Positiv Pressure is much recommended because then there isn't dust coming in from anywhere unfiltered.
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Old 13-08-14, 07:00 PM
ShaunB-91 ShaunB-91 is offline
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I'd say more intake, you need to bring in cooler air, yeah you can push hot air out with exhaust fans but enough fresh air will cool the warmer air anyway at least in my head that makes sense.
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Old 13-08-14, 07:05 PM
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Innocent159 Innocent159 is offline
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I still say it depends on your case it would be senseless putting an exhaust fan at the bottom just like it is senseless to have an intake at the top.
My gigabyte luxo m10 is weird structured.

see the fan at the back, what do I do? (psu pull cool air)
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Old 13-08-14, 07:06 PM
RamboOC RamboOC is offline
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I still say it depends on your case it would be senseless putting an exhaust fan at the bottom just like it is senseless to have an intake at the top.
My gigabyte luxo m10 is weird structured.

see the fan at the back, what do I do? (psu pull cool air)
In my opinion Back fan as exhaust, and let the fan at the front take in cool air to the whole system
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Old 13-08-14, 07:07 PM
MadShadow MadShadow is offline
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I still say it depends on your case it would be senseless putting an exhaust fan at the bottom just like it is senseless to have an intake at the top.
My gigabyte luxo m10 is weird structured.

see the fan at the back, what do I do? (psu pull cool air)
Wait, your PSU pulls air from the top or the back?
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Old 13-08-14, 07:08 PM
kbalaz kbalaz is offline
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I think ambient temperature has a bit part in this as well. In my case, Bitfenix Ghost, I have 2-120mm intake up top, 2-120mm intake up front and 1 exhaust out the back. I have tried flipping the top ones to exhaust and had better temperatures with them as intake and only the 1 exhaust out the back. Experiment with different configurations and find what works best for you.
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Old 13-08-14, 07:09 PM
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Originally Posted by RamboOC View Post
In my opinion Back as exhaust in my opinion, and let the fan at the front take in cool air to the whole system
there is no exhaust at that point imo. On the side of the psu is two intakes and the psu takes air in. the cpu (hot air) goes up...
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Old 13-08-14, 07:12 PM
RamboOC RamboOC is offline
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Originally Posted by MaddenShadow View Post
Wait, your PSU pulls air from the top or the back?
PSU with that structure pull air in from inside the case.
thats why some people prefere to have psu fan facing up than down so that it does not struggle to pull air in from the bottom of some cases which have poor air filters or not much clearance from the bottom
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Old 13-08-14, 07:12 PM
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Originally Posted by kbalaz View Post
I think ambient temperature has a bit part in this as well. In my case, Bitfenix Ghost, I have 2-120mm intake up top, 2-120mm intake up front and 1 exhaust out the back. I have tried flipping the top ones to exhaust and had better temperatures with them as intake and only the 1 exhaust out the back. Experiment with different configurations and find what works best for you.
that's what I did and this config I have now works well. I had top as intake and it had a noisy sound so I exhausted it and my temps decreased
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