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Help To Install Fans


thef1re
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Ive just got home with two fans, both 8cms. ive got space to insalll my fans on the back (2 spaces), 1 on the side or 1 on the front of the case. i know how to insall them. but i dont know where should i install them or which way. how should i install them? i am also confused with all this intake and outtake stuff. i currently only have 1 fan installed, the power supply fan. can u guys help me out? with the exhaust and intake stuff.

thnks

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Well, there are varying opinions whether positive or negative pressure is the way to go. Most people advocate a neutral pressure.

 

Positive Pressure = more air intake than exhaust. The pressure inside the case is greater than the pressure outside, so it "forces" hot air out of the case through various holes in the case.

 

Negative Pressure = more exhaust than intake. The pressure is greater outside the case than inside it, so cool air is "forced" into the case through the same tiny holes in the case.

 

Neutral Pressure = exhaust is equal to intake. The amount of air being taken in is the same as the amount of air being exhausted. This would allow for easy intake of cool air and expulsion of hot air. However, this does not always work well due to turbulence within the case moving air to places other than exhaust fans, causing hot air to be trapped. Only with really good ventilation is this option feasible. (ex. large fans and blowholes)

 

The best thing you can do is try fitting both fans on the back, check the temp after 30 minutes. Then shut down the comp for a few minutes, mount one fan on the side panel for intake, then do the same as before. I would personally recommend one intake fan and one fan for exhaust. If you have more options to mount fans, I suggest getting a fan controller and getting more fans.

Edited by kashk5

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k thnks, how do i make a fan go instaking or exhausting? do i flip the fan around etc??

and if i put both fans on the back, should i cover the side circle? (where fan shlould be) so it doesnt disturb air flow?

Edited by thef1re

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If you look at the side of the fan, you'll see arrows pointin in the direction it spins and the direction the air will flow through it. Just point the arrow the way you want the fan to blow.

Edited by kashk5

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nope cant find any arrows. mines one of thoses cheap no brand fans. anway, does it matter with wya it spins? which way should i want it to spin? should all the fans i install spine and blow air into same direction?

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It doesn't really matter which direction they spin (generally all fans spin in the same direction, it jus depends which side you're looking from) I suggest just hookin it up to a power connection, but not mounting it. Find out which direction it blows the air, then mark the fan within something, then mount them.

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Fans dont have an "option" for deciding whether they're exhaust or intake. All you do is point the fan in the direction you want the air to flow and mount it. Since you want neutral, you should put the one in the back as exhaust (blowing air OUT of the case) and the one on the side panel as intake (blowing air INTO the case)

 

You usually install them using screws.......... :huh:

Edited by kashk5

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ok then..never thought bout blowing the air out...casue i thought you know to make pc cooler, u let fan blow air into pc. but hey its the neurtral effect. if i mount both on back, i still got this hole on the side of my pc, shoukld i cover it up to not disturb air flow?both if i put 1 on side and 1 on back, i still got some holes on the back where anotehr fan should go..should i cover that up?

Edited by thef1re

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All right, you have an option for 4 fans. Since you currently have one exhaust fan (PSU), you should definitely have an intake fan. Now, are your hard drives right in front of the front intake fan position? If so, then you should mount one fan there to cool the hard drives. If not, then you might as well stick it on the side panel to draw cool air directly onto the CPU. You should also definitely put an exhaust fan on the back where you have space for 2 fans. An exhaust fan right next to the heatsink (not counting the PSU fan) is usually a good idea.

 

BTW, what kind of case do you have? I might have a better idea on what to do if I can take a look at the exact case.

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Oh ..i just opened my pc, to find i have spaces for 7 fans....2 on the back, 1 on the side, and 4 on the front from middle to bottom. Ok i am going to put 1 fan on back for exhauts (so i now have 2 exhaust including PSU). And now where should i put the otehr fan to act as an intake? should i put on side? or should i put on front? what should i do with the spare back fan hole? cover it up so airflow aint disturbed?

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