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Fan vs Exhaust? - Case Side Panel

post #1 of 15
Thread Starter 
Hey guys,

So, long story short, i've installed a 140mm case-fan to the side panel (side that comes off) of my system, but im unclear if a fan -> blowing onto the mobo, or an exhaust -> sucking the warm air from the mobo, its better.

Would be much appreciated if any of the cooling buffs could maybe shed some light on this, thanks alot.
post #2 of 15
How are the rest of your case fans set up?
post #3 of 15
Yeah - show us how your setup is - its hard to say what is best, since it depends on your airflow.

But besides that I would say, if you can monitor your case temp - see which one is better ..
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post #4 of 15
As mentioned above it usually depends on your other fans but I would probably suggest intake. Especially if the fan is directly beside the graphics cards. It would then be blowing cool air directly onto your cards.
    
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post #5 of 15
Generally if your GPU exhausts all the heat out the back of the case a side intake is beneficial, but if your GPU exhausts a lot of heat into the case running the side as an exhaust works better.

Back when I had GTX 295s, which exhaust half the heat into the PC, running a side exhaust dropped temps lower than having an intake.
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post #6 of 15
I have a 120mm fan intaking air from the side directly between my video cards. This is only a good idea if you have a couple of fans also exhausting air as the cooled intake air will quickly heat up and needs to be removed from the case....
post #7 of 15
Thread Starter 
Yeah apologies, should of put that in the OP, iv a fan@ the front of the case, by the HDD's, cpu is liquid cooled, PSU is top, facing down, and and exhaust at the back of the case. One other question aswell please, would be does anyone know of good fan software to control each case fan (except fanspeed), rather then controlling them all together? Thanks again fellas.

edit: GPU temps atm are good, idle@30, but im rebuilding the system atm, and il be installed a 2gb 6950 when i get the rest of the parts delivered, and it has a middle HSF.
Edited by Asmodean - 5/5/11 at 10:31am
post #8 of 15
Quote:
Originally Posted by franz View Post
Generally if your GPU exhausts all the heat out the back of the case a side intake is beneficial, but if your GPU exhausts a lot of heat into the case running the side as an exhaust works better.

Back when I had GTX 295s, which exhaust half the heat into the PC, running a side exhaust dropped temps lower than having an intake.
I disagree. My little brother has a 4850 that pushed air out the back and he still ended up with high temps. I switced his side fan from intake to exhaust and it help a ton. Case fans always need exhaust way more than intake.
post #9 of 15
Quote:
Originally Posted by scaz View Post
I disagree. My little brother has a 4850 that pushed air out the back and he still ended up with high temps. I switced his side fan from intake to exhaust and it help a ton. Case fans always need exhaust way more than intake.
Interesting. I guess fan direction goes on a case by case basis. No pun intended.

Generally the best thing to do is run it as an intake, run some tests, then run it as an exhaust and see which is best for you.
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post #10 of 15
Thread Starter 
Would it work if i had the top-side of the case -> fan->mobo,
and the lower side of the case -> exhaust->gpu,
if i went and bought another? or would that just make no bloody sense? lol
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