Can ventilation holes be so small that getting a high power fan would be a waste?

Bojangle12 · Apr 4, 2014

I was thinking of getting an 80mm exhaust fan with higher CFM, the current one is 34 CFM. But the holes on the vent are kind of small, and spaced far apart. I think no matter how powerful the air flow is, it's just impeded by the lack of open area.

Pic of my case:

Any thouhts?

COLGeek · Apr 4, 2014

That is a seriously restrictive design. I would consider getting a Dremel and cutting out that entire center section and covering with a grate. Or, I would replace the case.

Your concern is spot on, you can only create limited airflow through those openings.

COLGeek · Apr 4, 2014

KevinAr18 :

You can also use some high quality tin snips to cut out a hole as noted here:
http://www.silentpcreview.com/forums/viewtopic.php?t=2307

However, the problem with both my suggestion and COLGeeks suggestion is that it is not really safe to cut out the metal while you still have parts inside the computer. Little pieces of metal might fly into parts and end up shorting out components.

Another option would be to:
* Remove your case side-cover.
* Mark a spot on the side-cover near your CPU.
* Cut out a hole for a 120mm fan using either tin snips or COLGeek's suggestion.
* Attach a 120mm fan (using glue or screws or whatever) to help reduce the heat around the CPU.

* Also, you have to decide if blowing cooler air into the computer or pulling hot air out will give you better results in your setup.

+1 on the safety issues. Well put!

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Can ventilation holes be so small that getting a high power fan would be a waste?

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