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best airflow optomization for my air 540?

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  • Configuration
  • Fan
  • Systems
Last response: in Systems
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September 29, 2014 3:40:10 PM

hello all! i was wondering if 3 120mm fans in the front as intake with the rear 140mm as intake as well, and my h100i in a push configuration mounted on top, exhausting air out of the case from the top instead of from the back. the rear fan will provide air to the radiator fans. is this a good idea? or should i leave the rear fan as exhaust. will both the radiator and rear fan fight over the air to exhaust? thanks in advance

More about : airflow optomization air 540

September 29, 2014 3:47:20 PM

Leave the rear as exhaust. You'll be fine.
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September 29, 2014 3:47:49 PM

Read the Corsair instructions .... they definitively say "blow in".


The reason is .... inside air = 28C / coolant = 33C / Ambient = 23C

What you want cooling the coolant, the 5C difference air or the 10C ? The 10C cooler outside air will remove twice the heat from the coolant as the inside air.

Yes, heat rises as long as there's not a fan pushing it .... motor wins.

Yes, it puts some heat inside your case, nothing inside you case cares about 28C air.
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September 29, 2014 4:35:58 PM

JackNaylorPE said:
Read the Corsair instructions .... they definitively say "blow in".


The reason is .... inside air = 28C / coolant = 33C / Ambient = 23C

What you want cooling the coolant, the 5C difference air or the 10C ? The 10C cooler outside air will remove twice the heat from the coolant as the inside air.

Yes, heat rises as long as there's not a fan pushing it .... motor wins.

Yes, it puts some heat inside your case, nothing inside you case cares about 28C air.


soo...keep the radiator as intake?
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September 29, 2014 5:11:06 PM

Blow outside cool air into the radiator.... not hot inside air
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September 29, 2014 5:15:03 PM

JackNaylorPE said:
Blow outside cool air into the radiator.... not hot inside air


ok so keep the fans on top of radiator, and blow air from outside case into radiator?
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September 30, 2014 7:34:53 AM

Cold Air => Radiator => Case Interior....exactly as shown in the installation manual for the 100i

http://www.corsair.com/~/media/Corsair/download-files/m...

Quote:
1. Install the fans and radiator.

For the best cooling performance, we recommend mounting the fans as air intake to your PC case"


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September 30, 2014 9:25:26 PM

If possible, mount the radiator on the front of the case.
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October 4, 2014 1:21:02 PM

Cold air -> radiator -> fans set to intake

Or

Cold air -> fans set to intake -> radiator?
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October 4, 2014 4:49:45 PM

So, if I understand correctly, you are asking whether to install them in push or install them in pull ? Answer is yes :) 

Actually, with normal rads,it depends on rpm .... Corsair's might have a different switch point.


http://martinsliquidlab.petrastech.com/Radiator-Fan-Ori...

Quote:
Push Vs Pull - This depends on fan speed/power. The high speed fans at 2000RPM with a 38mm fan thickness provided the best performance in a push condition. The slow speed fans with 1350RPM with a 25mm fan thickness provided the best performance in a pull condition. I would estimate that performance line is likely to cross in the 1500-1700RPM range where they are equal. So.... slow speed = pull, high speed = push, medium speed = it doesn't really matter.





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October 4, 2014 6:18:33 PM

Would I do sp120 fans in push or pull intake? The fans will be low rpm when doing tasks other than gaming and rendering etc then the rpm will be higher.
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October 4, 2014 6:24:02 PM

The answers are in above post .... unless you plan on switching them when they go fast versus slow, you will have to pick the solution that best suits your usage. Think bout it though .... do you want to maximize thermal performance at idle and light loads or do you want to maximize performance when your CPU is under stress ?

My fans shut off at idle.
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October 4, 2014 7:17:50 PM

Hmmm wHat do you suggest I do?
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October 4, 2014 8:07:42 PM

I suggest you match the installation to your usage and I have no way of determining what that is. For example, many peeps tell me that they don't care about noise cuz they wear headphones while gaming. I don't know how you use your computer. I don't know how you are setting up your fan curves


Personally I wouldn't own a 100I because they are waaaay too noise for me. So if you are asking what I would do it would be to install a H220-X.

You no one see that the crossover point is 1500 - 1700 rpm. Pick whichever one you think you will be running at most of the time ..... your fans will go to 2700. If you fond your choice was wrong by observing rpms over time, just change it.

Another way to look at it is the only time you **need** peak efficiency, is when under full load so install it to run at peak efficiency when fans are at the upper half of your fan curve will be above 1500 rpm.
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October 4, 2014 8:20:50 PM

I'm one of those people who care about noise when I'm browsing the web or doing something that is not very high cpu usage. When I'm gaming I wear headphones so noise won't bother me. So do you suggest I do the push orientation then?
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