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Top Exhaust Fans For Tower

post #1 of 32
Thread Starter 
I'm wondering what size fans I should use at the top of my case. They will be used as exhaust fans.

They will be blowing unrestricted as they are located at the very top of my Chaser MK-1 case.

I'm leaning towards a good 200mm fan. If you agree I should use another 200mm fan, please provide some 200mm model suggestions please. smile.gif


Thank you all very much.
Edited by kingklick92 - 7/14/14 at 4:21am
post #2 of 32
I've used Bitfenix Spectre 200mm, Corsair, and Cooler Master Megaflow. All good fans in my opinion.
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post #3 of 32
Hey buddy, I read somewhere that having your top fans as exhaust isn't a great idea, It just takes the air away from hot components such as your RAM. It makes sense to me, and I actually believe it was a thread on this forum. Having them all as intake and one exhaust is meant to be good, but that's just me!

Edit: I just found it! "http://www.overclock.net/t/1394467/ocn-daves-air-cooling-guide-updated" Take a look if you want pal.
Edited by Gareth Ward - 7/8/14 at 12:52pm
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post #4 of 32
Quote:
Originally Posted by Gareth Ward View Post

Hey buddy, I read somewhere that having your top fans as exhaust isn't a great idea, It just takes the air away from hot components such as your RAM. It makes sense to me, and I actually believe it was a thread on this forum. Having them all as intake and one exhaust is meant to be good, but that's just me!

Edit: I just found it! "http://www.overclock.net/t/1394467/ocn-daves-air-cooling-guide-updated" Take a look if you want pal.
I disagree. I use 2 top fans in my current tower as exhaust. Remember from basic science, heat rises. The two fans at the top get rid of all the hot air accumulated in the case. It won't take any air away from RAM. Ram won't get THAT hot anyways. I just always say that heat rises, and it would make sense to have an exhaust fan up top.
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post #5 of 32
That link has lots and lots of black and white statements that are really huge gray areas.

Top exhaust can help or it can hurt. The problem is today's graphic cards make 2-4 times as much heat as CPUs do .. and generally their heated exhaust air is being dumped out of all sides of their PCB .. front, back top and bottom .. with only the back exiting the case. Using top exhaust usually draws that heated exhaust up around the CPU cooler increasing the air temp going into cooler .. and the warmer the air going in, the hotter the CPU will run.
  • Every case's airflow will be different and therefore will cool different.
  • Every setup in every case will effect the airflow and therefore will cool differently.
  • Tuning and optimizing case airflow / cooling is as important as sellecting components for an aircooled build .. and sadly the most ignored. Second link in my sig tries to explain the basics of how to do it.
post #6 of 32
I know guys like I said, that's just me!
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post #7 of 32
Quote:
Originally Posted by Gareth Ward View Post

I know guys like I said, that's just me!
I know guys .. and girls too! biggrin.gif
Silverstone has their 90-degrees rotated motherboard mount cases that are bottom to top airflow. ..and they work very well. A well setup front to back does the same thing.
post #8 of 32
Thread Starter 
Quote:
Originally Posted by Evilsplashy View Post

I disagree. I use 2 top fans in my current tower as exhaust. Remember from basic science, heat rises. The two fans at the top get rid of all the hot air accumulated in the case. It won't take any air away from RAM. Ram won't get THAT hot anyways. I just always say that heat rises, and it would make sense to have an exhaust fan up top.

This is EXACTLY why I use my top fans as exhaust smile.gif hopefully we are correct.


I appreciate the suggestion though, whoever linked that thread to me smile.gif
post #9 of 32
Thread Starter 
I really really appreciate the replies, but only one post recommended a brand/type of 200mm fan tongue.gif


More suggestions please? smile.gif
post #10 of 32
Quote:
Originally Posted by kingklick92 View Post

Quote:
Originally Posted by Evilsplashy View Post

I disagree. I use 2 top fans in my current tower as exhaust. Remember from basic science, heat rises. The two fans at the top get rid of all the hot air accumulated in the case. It won't take any air away from RAM. Ram won't get THAT hot anyways. I just always say that heat rises, and it would make sense to have an exhaust fan up top.

This is EXACTLY why I use my top fans as exhaust smile.gif hopefully we are correct.


I appreciate the suggestion though, whoever linked that thread to me smile.gif
"Heat rises" is not the same as hot air rises, which is only true without outside influences. Heat expands air making it lighter than cooler air around it, therefore it rises .. but only if it is not being moved by a fan or other source. In our computers we are using fans to move air .. and therefore fans move the air, not heat. Fan's do not believe your "heat rises" and move / suck / blow the heat wherever they are oriented to do. biggrin.gif

Phanteks PH-F200SP if you can find them. thumb.gif



Model NO : PH-F200SP_BK
Bearing Type = UFB (Updraft Floating Balance) Bearing
Fan Dimensions = 200 x 200 x 30mm
Blade Geometry = Nine Blades with MVB(Maelström Vortex Booster) Design
Speed (RPM) = 800 ± 250 rpm
Max Airflow = 110.1 CFM
Acoustical Noise = 25 dB (A)
Static Pressure = 1.04mm H2O
Input Current = 0.25 A
Rate Voltage = DC 12V
Input Power = 3 W
MTBF = >100,000 h
Cable Length = 900mm (Fan cable length 500mm + Extension Cable length 400mm)
Edited by doyll - 7/14/14 at 4:56am
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