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How should i position my computer fans?

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  • Computers
  • Components
Last response: in Components
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January 2, 2014 11:51:49 AM

Hello, I'm just wondering how i should position my new Computer fans, I just got two of them. One that goes on the side and one in the back. Should i have the side one blow in air and the back blow out? or both out? What makes people choose differently?

More about : position computer fans

January 2, 2014 11:59:12 AM

doesnt really matter, the key to having less dust in your system is to have more fans blowing air in than out :) 
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January 2, 2014 12:00:49 PM

If you have a slot in the front of your case have an intake there, if the side is the only slot you have then intake on the side, exhaust out the back.

A common setup is intake through front and bottom, exhaust through top and back. Heat rises so naturally the top is a good exhaust point and you generally have less space in the back and you don't want heat blowing out the front of your case so you exhaust out back.
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January 2, 2014 12:01:24 PM

Pill Junkey said:
doesnt really matter, the key to having less dust in your system is to have more fans blowing air in than out :) 


Oh, ok. But performance wise, is it better to have both blowing out?
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January 2, 2014 12:02:34 PM

Configure the top/back one on exhaust and then the second fan to blow air in on the video card/chipsets or move it to another position configured for intake (not the bottom of the case unless it is >1" off of whatever surface it is placed on and has a dust filter.
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January 2, 2014 12:03:56 PM

To test your performance you can run a benchmark such as 3Dmark and use a program such as coretemp, cpuZ or similar application capable of recording min and max temperatures and then compare each configuration to temperature.
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January 2, 2014 12:04:15 PM

Holy Wars said:
Hello, I'm just wondering how i should position my new Computer fans, I just got two of them. One that goes on the side and one in the back. Should i have the side one blow in air and the back blow out? or both out? What makes people choose differently?


well it comes to a decision, whether you want to create a vacuum effect in your case (blowing hot air out), which is in my oppinion more effective, but you also need dust filters, because the suction created by "vacuum" will suck air from outside the case through every hole naturaly (so also sucking in the dust).

Or you can create more air pressure inside (less out, more in), which will lower the amount of dust, but will be less effective in heat dissipation.

Basicaly if you have only 2 fans, best would be to position one in front bottom to suck cold air from front inside and the second one back top (since hot air goes up - physics and sh*t), this should create nice airflow.
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January 2, 2014 12:04:19 PM

burdenbound said:
If you have a slot in the front of your case have an intake there, if the side is the only slot you have then intake on the side, exhaust out the back.

A common setup is intake through front and bottom, exhaust through top and back. Heat rises so naturally the top is a good exhaust point and you generally have less space in the back and you don't want heat blowing out the front of your case so you exhaust out back.


Thank you so much. Yes, i only have two spaces i can put them at, one in the back, and one on the side. So thank you for answering me. :) 

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January 2, 2014 12:15:51 PM

dwatterworth said:
To test your performance you can run a benchmark such as 3Dmark and use a program such as coretemp, cpuZ or similar application capable of recording min and max temperatures and then compare each configuration to temperature.


Yeah, i use Speccy to tell me what my temperature's are for each piece of hardware and i just have it up on my second monitor and i look at it whenever and judge it off that. Which i hope is fine, please let me know if it is not accurate though.
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