PC Hardware forum

General discussion

Most efficient case fan set up

by greggkelly / January 24, 2008 2:47 AM PST

Hi,

I have a general question about where to put case fans. I know there are many, many different types of cases, but generally what is the best setup for intake and exhaust fans in an ATX case? And if you have two spots on the case door for fans, is it okay to put intake and exhaust fans next to each other on the side or should they both be going the same way?

Any input is much appreciated, thanks.

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Fans in general
by Willy / January 24, 2008 4:18 AM PST

Better cases have frt. & back mounting areas for fans. If not, you can rig them if you're capable. If you want you can add(cut hole) a side and/or top fan(s) for better cooling, again if capable but this isn't a big deal. A simple buss slot fan is available for mounting in the slot area next to a video card or not, but usually these exhaust. Any good fan should have embossed arrow or label to show airflow direction,, thus mount as required.

good luck -----Willy Happy

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In general.
by Bob__B / January 24, 2008 5:49 AM PST

In at the bottom.....out at the top.
If you have temp sensors in the machine...most machines do...use them.
Play with the fans...watch the sensors...it takes a little time but you'll figure out what's best.

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Ideal Airflow
by sunwatcher / January 24, 2008 6:38 AM PST

Yes, there are many different configurations for cases, but generally there are some guidelines to follow when determining ideal airflow. You'll want a crossflow across the components inside, normally with cooler air being drawn in from the front and sides and hot air being exhausted out of the front and back. Of course, this depends on if your case has mounting points for those locations. You'll also have to take your power supply's airflow into consideration.

It's not a good idea to mount two fans side by side blowing in opposite directions (one blowing in and one blowing out). This will inhibit good airflow across the interior components.

Unfortunately there isn't one simple answer for all types of cases, but there are plenty of resources on the web!

http://www.google.com.au/search?source=ig&hl=en&rlz=&q=computer+case+fan+airflow&meta=

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Correction To Post
by sunwatcher / January 24, 2008 8:47 AM PST
In reply to: Ideal Airflow

Sorry, meant to say...

"...cooler air being drawn in from the front and sides and hot air being exhausted out of the <b><u>top</u></b> and back."

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thanks
by greggkelly / January 24, 2008 9:25 AM PST
In reply to: Correction To Post

Hah, alright. Thanks everyone for advice.

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