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Where should I place my computer case fans?
I have a fairly new computer that runs fairly hot. I plan on getting a new cpu cooler to bring that down a little and maybe overclock a little. My video card (xfx ati radeon hd 5750) is barelly overclocked and has gotten in the 80's (C) while playing Bioshock. I will have one 80mm fan and 2 120mm fans. Where would be the best place for each fan and what direction should they be pushing air?
i.e. I know the fan on the back should be blowing out, but what size should I put back there? Should I put the 80 or a 120 on the side blowing in or out? I also know front should be blowing in.
2 Answers
- Anonymous1 decade agoFavorite Answer
The concept is that you want high exhaust volume because you won't cool anything if you can't suck the heat out. Then you want just a little bit more total air intake volume than exhaust.
The reason for more intake than exhaust is that you should be running filters on your intake fans. When you have a little more intake than exhaust, you have what they call 'positive pressure' inside the case and then you know that all the air getting into your PC passes through the filters. When you have more exhaust than intake, the extra air comes in unfiltered through any crack and especially through you optical drives and any other opening. Filters and positive air pressure keeps it clean. Big exhaust keeps it cool.
Example: I have 2 120mm exhaust fans in the back taking the heat out. I have 1 120mm intake fan blowing across my drives and 1 120mm intake blowing into the CPU / Memory area - this makes sure the CPU cooler has cool air to work with. Last, I have 1 80mm intake fan blowing on my video card.
Plus, for a few bucks more you should add filters to all intake fans to prevent dust buildup.
So, with this kind of setup, you have cool, clean air blowing into the high temp areas, move the heat out so the exhaust fans can suck it out.
- 5 years ago
Any further lovers you'll be able to placed to your case can support preserve you card cool. If you'll be able to, purchase two, mount one in entrance blowing in and one in again blowing out, get well airflow via there
